45results about How to "Improve health protection" patented technology

The invention discloses a technology for preparing amoxicillin by a straight-through method. The technology takes a penicillin degreasing fluid as a starting raw material; 6-APA (6-amino penicillanic acid) crystallization, suction filtration, washing and drying steps are saved; the amoxicillin can be prepared without obtaining solid 6-APA via separation; and the prepared amoxicillin meets a requirement of a medicinal standard. The technology saves an operation procedure, reduces the labor intensity of production personnel, lowers the production cost, reduces environmental protection pressure, avoids contact between the production personnel and 6-APA dry powder, and reduces anaphylaxis.

The invention provides a preparation method of bilobalide B and the bilobalide B prepared therefrom. In the preparation method of the bilobalide B, the toxic organic solvent is replaced with ethyl alcohol and water in association with separation column, aqueous processing and recrystallization of ethyl alcohol of low and intermediate concentrations, so as to separate and purify the bilobalide B, thereby obtaining the bilobalide B of a high purity, with few impurity content, and without bilobalide as well as allergenic component ginkgolic acid.

The invention relates to a range hood capable of performing lampblack and hearth linkage according to working environment. The range hood comprises a range hood body, a temperature sensing module, animage acquiring device and a polycyclic aromatic hydrocarbon detection device, wherein the range hood body can be linked with external cookers and adjust operation according to the working environment; the temperature sensing module is used for detecting temperature in a cooking region; the image acquiring device is used for analyzing lampblack images of the cooking region, and obtaining the magnitude of produced lampblack in a real-time manner; the polycyclic aromatic hydrocarbon detection device is used for performing calculation according to the temperature of the detected cooking region and the concentration of lampblack in the cooking region so as to obtain current polycyclic aromatic hydrocarbon of the cooking region; and the temperature sensing module, the image acquiring device andthe polycyclic aromatic hydrocarbon detection device are separately and electrically connected with the range hood body. According to the range hood capable of performing lampblack and hearth linkageaccording to working environment disclosed by the invention, the current concentration of the polycyclic aromatic hydrocarbon of the cooking region can be obtained through calculating the magnitude of the lampblack in the cooking region; besides, according to the magnitude of the lampblack, the temperature in the cooking region and the concentration of the polycyclic aromatic hydrocarbon, a fan and a lampblack separating device are automatically adjusted, so that lampblack and harmful gas are quickly pumped from a kitchen; the range hood can be linked with the external cookers, generation ofthe harmful gas and the lampblack can be effectively reduced, and the health guarantee of a user is greatly improved.

The invention discloses an air circulation method implemented through a ventilating device. According to the method, the ventilating device is used. The ventilating device comprises a fixing machine body. An energy conservation device is fixedly arranged at the rear side of the rear end wall of the fixing machine body. A ventilating pipe is arranged inside the fixing machine body, wherein the ventilating pipe is opened backwards. A humidification space is formed inside the front end wall of the ventilating pipe. An air suction space is formed between the humidification space and the ventilating pipe. The air suction space enables the ventilating pipe to communicate with the humidification space. A first sliding component is arranged at the left side of the ventilating pipe. According to the air circulation method, belt transmission control is adopted, and operation synchronism of equipment is improved; by means of the energy conservation device, solar energy is converted into electricenergy to be stored and supplied to the equipment for operation, consumption of nonrenewable energy is reduced, and energy conservation and emission reduction are achieved; by means of a humidification mechanism, the air quality can be improved, and the experience and health guarantee of users are enhanced; and by means of a direction control component, the air circulation direction can be controlled, the users can conduct adjustment and control according to the need conveniently, and practicability of the equipment is improved.

The invention belongs to the technical field of welding machines, and particularly relates to a laser welding machine. The laser welding machine aims to solve the technical problems that an existing laser welding machine cannot effectively filter smoke generated by welding, and after workers inhale smoke dust for a long time, the symptoms such as dizziness, headache, cough, chest distress and shortness of breath can be caused, and the health of the workers is greatly influenced. According to the scheme, the laser welding machine comprises a shell, wherein a supporting plate is fixedly connected to the outer wall of the top of the shell, an air hole penetrating through the supporting plate is formed in the outer wall of the top of the shell, a vertical plate and a folding plate are fixedlyconnected to the outer wall of the top of the supporting plate, and one end of an output shaft of a motor is fixedly connected with a clamping mechanism. According to the laser welding machine, the clamping mechanism is arranged, a pipe is fixedly clamped through the clamping mechanism, the smoke generated during welding can be sucked into a conical cylinder from the air hole under the action of an air pump and then enters a filtering mechanism, and particles and harmful gas in the smoke can be effectively filtered under the action of the filtering mechanism.

The invention discloses a remote monitoring system for supporting CRRT. The remote monitoring system comprises a doctor mobile terminal, a patient mobile terminal, a remote control center, a CRRT device, a monitoring module and a wireless communication module, wherein the doctor mobile terminal is wirelessly connected with the remote control center through the wireless communication module; the remote control center is wirelessly connected with the monitoring module through the wireless communication module; the monitoring module is wirelessly connected with the patient mobile terminal throughthe wireless communication module; the remote control center is electrically connected with the CRRT device; and the CRRT device is electrically connected with the monitoring module. According to thesystem, image information of a patient and parameter information of blood led to the outside of a body are obtained through the monitoring module, and the information is sent to the remote control center for data storage and risk analysis. Thereby, the illness monitoring of a patient in the treatment process by using the CRRT device is actively and effectively realized, and the reliability of themonitoring result is high. With the cooperation of a timing module for real-time storage, the medical personnel can conveniently know the physical state and physiological parameter information of a patient from multiple aspects even if the time is beyond 8 hours, and the medical support can be more accurately provided.

The invention discloses a smoke suppression and dust falling system and method facing a centralized slag loading area. The system comprises a walking type engineering machine used for dross clearing in the slag loading area, the walking type engineering machine carries a smoke detection device of the smoke amount of the environment where the device is located, the smoke detection device is connected with a spraying control system used for spraying and dust falling through a master controller, the spraying control system is connected with a drug configuration device used for providing drug spraying through a drug conveying device, and the walking type engineering machine is provided with a cab control device used for controlling the spraying control system, the drug conveying device and thedrug configuration device. The novel dust suppression scheme is creatively adopted to be combined with an automatic control system, the system is directly arranged on a construction machine, on the appropriate time, centralized operation is achieved, and the effects of rapidly suppressing dust, removing smoke and purifying air are achieved.

The invention relates to a range hood controlled according to working environment. The range hood is provided with a range hood body capable of adjusting operation according to the working environment, an environment detection device, a fan and an oil smoke separator for separating oil smoke particles, wherein the environment detection device is used for calculating to obtain current polycyclic aromatic hydrocarbon concentration in a cooking area according to the detected temperature in the cooking area and the oil smoke size in the cooking area; and the fan and the oil smoke separator are assembled on the range hood body. The range hood controlled according to the working environment can calculate the current polycyclic aromatic hydrocarbon concentration in the cooking area according to the oil smoke size in the cooking area, and the fan and the oil smoke separation device can be automatically adjusted according to the oil smoke size, the temperature in the cooking area and the polycyclic aromatic hydrocarbon concentration, so that the oil smoke and harmful gases are rapidly pumped out of a kitchen; and the range hood can be linked with an external cooker, so that the generation of the harmful gases and oil smoke is effectively reduced, and the health protection of users is greatly improved.

A timed cut-off system applied to a drainage tube comprises a positioning mechanism used to position the drainage tube, a cut-off mechanism and a control unit, wherein the cut-off mechanism comprises a slide rail and a main shaft, a round extrusion plate is disposed on the end part of the main shaft, and an arc raised part is disposed on the round extrusion plate; and the positioning mechanism comprises an extending plate and a supporting plate I, an arc raised thin block is disposed on the supporting plate I, a neck I is formed in the arc raised thin block, a fixed stop dog is disposed on the neck I, the other side of the neck I is equipped with a movable clamping block made of an elastic material, the movable clamping block comprises a plate-shaped part and two clamping parts, and slideways clamped on edges of the arc raised thin blocks are formed in the middle parts of the two clamping parts. According to the invention, the drainage tube can be opened and closed at scheduled time; and the system is applicable to drainage tubes with different sizes, so workloads of medical workers are relieved.

The invention discloses a student desk convenient for dust removal, including a table plate, the middle position of the upper end face of the table plate is arranged as a working plane, the left end of the upper end face of the table plate is provided with a wiping bracket, The right end of the upper end face of the table plate is provided with a dust suction bracket, the upper end face of the table plate is provided with a pair of side support columns symmetrical to each other, the lower end face of the table plate is provided with four base support columns, the right end face of the lower end face of the table plate is provided with a dust filter box, the left end face of the lower end face of the table plate is provided with a main frame, and the upper end of the side support columns isprovided with a book shelf. By arranging a wiping bracket, a dust suction bracket and a heating bracket, the invention makes the use of the desk more suitable for the use habit of students, improvesthe study habit of students and improves the protection of students' health.

The invention relates to a portable thrombus detection device based on broadband bioelectrical impedance, which is characterized in that the function of detecting thrombus in blood is realized by utilizing the dielectric relaxation difference of the blood under different thrombus states and the change of related broadband electrical impedance parameters. In the detection process, only fingertip blood sampling needs to be conducted on a patient, blood is placed in the detection bin and the contrast bin, broadband bioelectrical impedance signals of blood samples in the detection bin and the contrast bin are detected, data comparison and database analysis are conducted, and the thrombus degree in the blood is calculated. The portable thrombus detection device based on the broadband bioelectrical impedance can achieve portable detection of thrombus, provides convenient and rapid blood thrombus state detection for a large number of cardiovascular disease patients under the increasingly aggravated aging social background in China, and improves the health guarantee of the cardiovascular disease patients in China.

The invention relates to a kitchen environment air quality prompt device. The kitchen environment air quality prompt device is provided with a temperature sensing module, an image acquisition module,a polycyclic aromatic hydrocarbon detection module and a prompt module; the temperature sensing module is used for detecting the temperature of a cooking area; the image acquisition module is used foranalyzing a cooking area oil smoke image and obtaining the amount of generated oil smoke in real time; the polycyclic aromatic hydrocarbon detection module is used for obtaining the polycyclic aromatic hydrocarbon concentration in the current cooking area according to the detected temperature of the cooking area and the amount of oil smoke in the cooking area; and the temperature sensing module,the image acquisition module and the polycyclic aromatic hydrocarbon detection module are electrically connected with the prompt module respectively. The kitchen environment air quality prompt devicecan calculate the polycyclic aromatic hydrocarbon concentration in the current cooking area according to the temperature of the cooking area and the oil smoke condition of the cooking area, and send aprompt signal; the prompt device can give an alarm in time; therefore, a user can know the harmful gas condition in the current environment at the first moment, and make corresponding protection; andthe health protection of users is greatly improved.

The invention discloses a control structure for a portable numerical control (NC) flame cutting machine. The control structure comprises a remote control device. The remote control device is connected with a wireless receiving unit of a control unit through a wireless transmitting unit connected with the remote control device. Cutting torch lifting motors, an ignition control valve, an axial expansion motor and a machine body moving driving motor are connected to the control unit. The remote control device is adopted for controlling; starting, stopping, inching and direct feeding of the cutting machine are realized; remote operation is realized through remote control; the influence on the bodies of operators working for a long time, which is caused by a large amount of dust generated in cutting, is avoided, so that the health security of the operators is improved; multiple cutting torches operate, so that the efficiency is high, and the production cost is reduced; the problems that in the prior art, only close range operation is conducted, the influence on the bodies of the operators from dust is serious, and the efficiency is low since a single cutting torch operates are effectively solved, and the control structure has the characteristics of simple structure and low cost.

The invention provides an underwear dry-cleaning device, and relates to the technical field of a dry-cleaning device. The underwear dry-cleaning device comprises a device body, wherein the device body is a sealed square body defined by a left side plate, a back plate, a right side plate, a top plate, a bottom plate and a front cover, one side of the front cover is rotationally and fixedly connected with the side plates, the other side of the front cover is fixedly connected with the other side plate through a dismountable structure, two protection covers and two fixing clamp buckles are at least fixedly arranged in the device body, each protection cover is a hollow sphere, in addition, a drying device is arranged inside each protection cover, a plurality of heat radiation holes are formed in each protection cover, an ultraviolet sterilization device is also fixedly arranged in the device body, exhausting openings, a power supply switch and a power supply interface are arranged on the device body, and a display screen is arranged on the top plate. The underwear dry-cleaning device has the advantage that water washing is not needed, and underwear is directly hung in the underwear dry-cleaning device to be dried after being worn.

The invention discloses a handheld portable illumination observer for a limited space and a dark environment. The handheld portable illumination observer comprises a tubular observation part, a lighting part axially arranged around the observation part, and an external connection part, the lighting part comprises a panel, an LED bulb lamp, a conduction copper plate, a soldering tin contact, a fastening thread, a bottom cover, a manual switch knob, a lighting part structural body, a first objective lens, a stainless steel internal thread, a sealing strip fixing buckle, a water stop sealing strip, an LED bulb lamp thread fixing base, a battery clamp, a battery, an inner partition plate and a conductive metal base; the observation part comprises an eyepiece, a stop card, an observation part structural body, an aluminum reflection mirror surface inner cavity and a second objective lens; and the external connection part is used for externally connecting an observation device, a detection device and a video recording device, so that additional detection and video recording functions besides illumination observation are realized, and corresponding activities are carried out. The observer has the advantages of small size, simple structure, convenience in prefabrication, less material consumption, short manufacturing and processing period and low processing cost, and the raw materials and parts are semi-finished products and are convenient to purchase.

The invention discloses a recycling device for clearing a waste paint bucket. The recycling device comprises a box body, wherein a lower rotating cavity with an upward opening is formed in the box body, a waste cavity with a downward opening is formed in the lower side of the lower rotating cavity in a partial communicating mode, a synchronous cavity which partially communicates with the waste cavity is formed in the lower side of the lower rotating cavity, a lifting cavity located at the right side of the waste cavity is formed in the lower side of the synchronous cavity, a clearing device isarranged in the lower rotating cavity, and the clearing device comprises a transmission shaft which is rotationally arranged on the upper end wall of the lifting cavity, penetrates through the synchronous cavity and extends into the lower rotating cavity. According to the recycling device, the paint bucket is clamped and fixed, paint which is hardened inside is crushed, and paint adhering to theinner wall of the paint bucket is cleared, so that the paint bucket recycling quality is improved, manpower and material resources consumed for clearing the waste paint are reduced, the recycling efficiency is improved, economic growth is promoted, and the waste paint can be treated in a centralized mode.

The invention relates to the technical field of intelligent sanitary fittings, and provides an intelligent closestool cover and an intelligent closestool, which are used for being mounted on a closestool main body, the closestool cover comprises a closestool gasket used for supporting a human body to sit and a cover body used for covering the closestool gasket, and the cover body is hinged to theclosestool gasket; the closestool seat is provided with an induction assembly used for obtaining defecation state information of a human body, an optical sterilization assembly used for killing bacteria and a control assembly, and the control assembly is electrically connected with the induction assembly and the optical sterilization assembly so as to receive induction information of the inductionassembly and control the optical sterilization assembly to conduct sterilization. According to the invention, the optical sterilization assembly is adopted to irradiate the toilet and the human skin,germs inside the closestool body and on the human body surface are effectively killed, breeding and spreading of the germs are avoided, and the threat to the health of a user due to breeding of the germs in the closestool is eliminated; meanwhile, pathogenic microorganisms carried by the body surface of the human body can be killed, and then the health of the user is guaranteed.

The invention discloses an orthogonal multidirectional adjusting healthcare pillow. A front upper curved face is arranged according to requirements on being coincident with natural bending degree of the neck of a human body, a middle curved face and front and rear transition curved faces form ear protection grooves which are straight-through, a rear upper curved face is a plane or a gentle curvedface, a difference value between vertical height of the rear upper curved face and the front upper curved face is adjusted by adjusting height of a rear inner container, the height of the rear inner container relative to a front inner container is adjustable, whole inside structure is adjustable in height, each of the rear inner container and the front inner container is made of a soft and elasticmaterial, and an outer layer is made of an elastic material. A height adjusting method includes: arranging a manual adjusting compensation device, or arranging an automatic adjusting compensation device, or combining the above two modes. Gaps of the prior art are filled in, and the pillow can be close to actual needs of users from multiple size directions; the pillow has the advantages that service quality is improved, and health protection is enhanced.

The invention discloses a production method of organic farmyard manure and relates to the technical field of fertilizer. The production method includes: building a seepage-preventing storage tank, a stirring tank, a fermentation tank and a liquid excrement storage tank, and building rain-proof sheds over the tanks; mounting the matched crusher, hay cutter, stirring machine, turning conveyor and beating equipment; collecting daily kitchen waste and livestock and human excrement, sorting the kitchen waste and livestock and human excrement, crushing the sorted kitchen waste and livestock and human excrement in a unified manner, beating, and storing; recycling non-degradable waste such as plastic and glass, and arranging and packaging for centralized selling; mixing the crushed straw, kitchenwaste and livestock and human excrement with corrosives and nitrogen phosphorus and potassium compound fertilizer according to a certain weight proportion to produce the organic farmyard manure. The production method has the advantages that the straw, livestock and human excrement and household waste are used as the main production raw materials, the daily garbage and straw can be recycled, energyis saved, the blank of fertilizer for green industry development can be filled up, and the use amount of chemical fertilizer is reduced to the maximum extent.

The invention discloses an oil tea bud-stock cleft grafting biological protective breeding sleeve, belongs to a plant grafting protective breeding device, and the protective breeding sleeve is especially suitable for grafting by an oil tea bud-stock cleft grafting method. In existing technical operation, grafting positions are wrapped by aluminum sheaths in grafting, health of operating personnel would be influenced and damaged after long-time contact, and with growth of plants after grafting, the aluminum sheaths fall in soil and cannot be decomposed, and would pollute soil and environment for a long time. In order to improve health protection on operating personnel, provide convenience for grafting operation, and prevent aluminum metal from polluting soil and environment, the oil tea bud-stock cleft grafting biological protective breeding sleeve which is natural and harmless, and can be degraded rapidly is provided. The oil tea bud-stock cleft grafting biological protective breeding sleeve is formed by cutting intestinal canals, the intestinal canals being formed by drying poultry intestines in the sun, the poultry intestines being easily and naturally degraded, such as chicken intestines and duck intestines, etc. and drying the poultry intestines. The oil tea bud-stock cleft grafting biological protective breeding sleeve is simple in structure and easy in production, and is convenient and practical, and turns waste into wealth, and is natural and environmentally-friendly.

A manufacturing method of a molecular resonance cigarette holder rod comprises performing opening treatment on an acetate fiber bundle; adding a plasticizer to the treated acetate fiber bundle, and adding molecular resonance material powder to the acetate fiber bundle before adding the plasticizer. In the cigarette holder filter core manufacturing process, the molecular resonance material powder is added to an acetate fiber material, the effects of filtering out harmful gas and degrading harmful substances are achieved, and accordingly health protection of smokers is reinforced.

The invention discloses a waste silk cleaning device for textile fabric processing, and relates to the field of textile fabric waste silk cleaning. The waste silk cleaning device for textile cloth processing includes a bottom plate, the top outer surface of the bottom plate is fixedly installed with a first side frame, a second side frame, a fixing plate, a vacuum cleaner and a collection box, and the inside of the bottom plate is provided with a The second chute, the inside of the second chute is slidingly installed with a second slider, the top of the second slider is fixedly installed with an auxiliary seat, the top outer surface of the auxiliary seat is fixedly installed with an auxiliary plate, and the top outer surface of the auxiliary plate is fixed A support plate is installed, the bottom outer surface of the support plate is fixedly installed with a motor, the top outer surface of the support plate is fixedly rotated and installed with a screw rod and a limit rod is fixedly installed, and the output shaft of the motor runs through the support plate and is fixedly connected with the screw rod. . The invention replaces the traditional way of manually cleaning the waste silk of textile fabrics, improves the work efficiency of workers, and reduces the work intensity.

The invention belongs to the technical field of garbage cans, and particularly relates to an intelligent garbage can for medical treatment and public health, which comprises a can body, a cover body, a lifting component, an extrusion component, a contraction component and a welding component, according to the garbage bag welding device, a controller enables a contraction part to work, then a garbage bag body in a can body becomes loose, meanwhile, the controller drives a first screw to rotate synchronously, then an extrusion part and a welding part are driven to move through a lifting plate, and meanwhile the controller drives a second screw to rotate through a second motor; the extrusion plates and the welding part are driven to move towards the middle of the can body, then the extrusion plates move to the position above the garbage and extrude the bag body, then the welding part welds the garbage bag body between the extrusion plates, and then the part of medical garbage is stored in a sealed mode. Harmful substances such as viruses and bacteria and peculiar smell are prevented from diffusing into the air when the medical waste is thrown, the air quality is improved, and the health guarantee of medical staff, patients and family members is improved.

The invention discloses a low-concentration, fine-grain tailings dehydration treatment device and method, which belong to the technical field of tailings dehydration treatment, and include an outer sleeve, a dehydration mechanism, a driving mechanism, a top cover and a feeding mechanism. The outer sleeve A dehydration mechanism is installed in the middle of the dehydration mechanism, and a drive mechanism is slidably connected to the side wall of the dehydration mechanism. A top cover is installed on the top of the outer sleeve, and a feeding mechanism is installed in the middle of the top cover; the dehydration mechanism includes a first-stage Dehydration chamber, secondary dehydration chamber, tertiary dehydration chamber, heating components, rack side, spiral flow channel, sand screen plate, mineral material outlet and baffle. The closed grading bin is used to heat and dehydrate the tailings ore. The concrete aggregate is used as the heat conduction medium. The contact area with the ore is large, the heat conduction is uniform and overheating is avoided, and the moisture inside the wet ore is dried with heat to achieve fast and efficient dehydration. Radioactive elements to build a safe dehydration environment.

The invention discloses an environment-friendly shrink-proof high-strength fabric, and relates to the technical field of textiles. The fabric is prepared from 30-35% of a natural fabric, 22-30% of polyethylene, 7-10% of an ultraviolet shielding agent, 2-5% of nano zinc oxide, 4-6% of polynosic, 4-6% of synthetic fiber, 2-3% of a thickening agent, 5-6% of copper ammonia fiber, 2-3% of guar gum andthe balance water. The invention further discloses a production technology of the environment-friendly shrink-proof high-strength fabric. The production technology includes the steps of A, stirring, B, combining, C, fusion, D, drying, E, synthesis, and F, processing. The natural fabric serves as a main raw material, and the cotton fabric easily keeps people warm and is soft, close-fitting and goodin moisture absorption and air permeability. By means of the ultraviolet shielding agent and the copper ammonia fiber, the fabric has the antibacterial and bacteriostatic capacity and improves the capacity of protecting the health of the human body; polyethylene of the fabric serves as a reinforcing agent so that the overall strength and overall stability of the fabric can be effectively improved.

The invention relates to the technical field of garbage cans, in particular to a movable garbage can, a control method of the movable garbage can, control device and a storage medium. According to the movable garbage can provided by the invention, universal wheels suitable for driving a garbage can body to move are arranged at the bottom of the garbage can body, the universal wheels are controlled by a processor to drive the garbage can body to move towards the preset position so that the movement of the movable garbage can can be controlled according to the needs of a user, therefore, when the garbage can is not used, the garbage can can be far away from the user, the peculiar smell near the activity area of the user is reduced, the sanitation guarantee is improved, when the user needs to use the garbage can, the garbage can is controlled to automatically move to the user, the user does not need to get up to find the garbage can, and user experience is improved.

The invention discloses a cleaning solution which comprises the following raw materials in parts by weight: 20-40 parts of deionized water, 15-30 parts of alcohol, 5-15 parts of a chromic acid solution, 3-8 parts of a 5% oxalic acid solution, 5-15 parts of a 10% trisodium phosphate solution, 4-12 parts of an organic solvent, 10-20 parts of a 10% sodium hydroxide solution, 5-10 parts of concentrated hydrochloric acid, 1-3 parts of a neutralizer and 1-5 parts of an emulsifier. The trisodium phosphate solution and the organic solvent are added into the clear liquid, the cleaning effect of the cleaning liquid on oil stains and grease pollutants is improved, meanwhile, concentrated hydrochloric acid is also added during cleaning, the scale cleaning capacity is enhanced, and the cleaning efficiency is improved. Pollutants on the surface of an appliance can be removed only by being mixed with a certain proportion of water and flushing the appliance in the cleaning process, the cleaning effectof the appliance is improved, alcohol is added into clear liquid, the alcohol can sterilize and disinfect the surface of the appliance in the cleaning process, the disinfection effect of the cleaningliquid on the appliance is improved, and threats brought by bacteria are reduced.

The invention provides a preparation method of bilobalide B and the bilobalide B prepared therefrom. In the preparation method of the bilobalide B, the toxic organic solvent is replaced with ethyl alcohol and water in association with separation column, aqueous processing and recrystallization of ethyl alcohol of low and intermediate concentrations, so as to separate and purify the bilobalide B, thereby obtaining the bilobalide B of a high purity, with few impurity content, and without bilobalide as well as allergenic component ginkgolic acid.