67results about How to "The preparation method is easy to implement" patented technology

The invention belongs to the field of porous ceramic materials and particularly relates to a gradient-pore silicon nitride and silicon carbide combined film tube and a preparation method therefor. The film tube material is prepared from silicon nitride and silicon carbide, and a gradient filtering structure is formed by a supporting body layer and a surface film layer; a supporting body is formed through combining silicon nitride produced from a reaction with coarse silicon carbide grains and has the average pore size of 10 to 80 microns, the surface film layer is formed through combining the silicon nitride produced from the reaction with fine silicon carbide grains and has the average pore size of 0.1 to 20 microns, and the overall porosity of the film tube is 35% to 50%. The preparation method sequentially comprises the steps of carrying out batching, forming the supporting body, preparing the film layer and carrying out firing, wherein the forming is carried out by adopting isostatic pressing, the forming pressure is controlled to 40MPa to 150MPa, the firing temperature is controlled to 1,400 DEG C to 1,650 DEG C, and the heat preserving time is 3 to 5 hours. The film tube can be used in an oxidative atmosphere, can also be used in a reducing atmosphere, is high in acid-alkali corrosion resistance and can be applied to the filtering and purifying of various high- and low-temperature fluids of coal gasification chemical industry, IGCC and PFBC coal-gasified power generation, high-temperature flue gas, automobile exhaust gas, water purification and the like.

The invention belongs to the field of porous ceramic materials and discloses a silicon carbide filtering film and a low temperature preparation method thereof. The silicon carbide filtering film comprises pure SiC, a surface film layer is prepared from fine grain silicon carbide through accumulation, has the pore diameter of 20 nanometers to 20 micrometers and film layer porosity of 40-50% and has high through porosity, low pressure drop, high strength, good thermal shock resistance and a high usage temperature. Film slurry is prepared from fine silicon carbide particles, an organosilicon precursor and a pore forming agent additive, the surface is spray-coated with the film slurry so that a film layer is formed, and the film layer is dried and sintered so that a pure silicon carbide film is obtained. The organosilicon precursor is cracked to produce a coupling phase, a sintering temperature is low, an aperture structure can be controlled easily, and the film layer can be used in an oxidation atmosphere and in a reduction atmosphere, has strong acid and base resistance and can be used for various high and low temperature fluid filtering purification such as coal gasification chemical engineering, IGCC and PFBC coal gasification generating, and high temperature flue gas, automobile exhaust and water purification.

The invention relates to a preparation method of a multilevel-structured hollow nano-sphere of negative electrode material of a high-performance lithium ion secondary battery. The preparation method comprises the following steps: with a zinc source, a tin source and weak base as raw materials as well as surfactant polyacrylic acid (PAA) as a template, synthesizing a multilevel-structured hollow zinc hydroxystannate nano-sphere by virtue of a one-step hydrothermal method, wherein the diameter of the nano-sphere is 400-600nm; calcining in an air atmosphere, so as to obtain a morphology-maintained multilevel-structured zinc stannate nano-sphere structure. According to the preparation method, when the multilevel-structured hollow zinc hydroxystannate nano-sphere and a multilevel-structured zinc stannate nano-sphere are utilized as the negative electrode materials of the lithium ion secondary battery, both the two compounds show excellent electrochemical performance, high specific discharge capacity, good cycling stability and excellent rate capability; due to a specific multilevel structure, the hollow nano-sphere can provide a large surface area and a stable structure and can be widely applied to the fields of catalysis, the lithium ion secondary battery, solar cells and the like.

The invention relates to a nano cable made of a magnetic material and a half-metallic material and a preparation method thereof. The nano cable comprises a nano cable core and a cable shell layer, wherein the cable shell layer is coated outside the nano cable core, and the nano cable core and the cable shell layer are coaxial; the nano cable core is made of half-metallic bismuth, and the nano cable shell layer is made of magnetic metallic nickel; and the diameter of the nano cable core is 20-170nm, and the thickness of the nano cable shell layer is 10-80nm. The preparation method comprises the following steps of: obtaining a through-hole alumina template by adopting a secondary anode oxidation method, evaporating a metallic membrane on the alumina template, carrying out corroding to form a through hole, then depositing in electrolyte to realize the direct electrochemical deposition in the through hole of the alumina template to obtain a nickel (shell) and bismuth (core) nano cable, and finally placing a bismuth core wire and a nickel shell into the through hole thereof and placing into a strongly alkaline solution to corrode the alumina template to prepare the nano cable comprising the bismuth core wire and the nickel shell.

Belonging to the field of porous ceramic materials, the invention in particular relates to a pure foam silicon carbide support membrane tube with a three-gradient pore structure and a preparation method thereof. According to the foam silicon carbide support membrane tube, a dual-gradient pore structure pure foam silicon carbide support and a surface film layer form a three-gradient filtration structure, the support is composed of a dual-gradient pore structure pure foam silicon carbide support, the average pore size of the outer layer is 300-500micrometers, the average pore size of the inner layer is 1-3mm, and the support porosity is 35-65%; the surface film layer is formed by combination of silicon carbide powder, the pore size is 50nm-20micrometers, and the film layer porosity is 35%-50%. The preparation method comprises the following steps in order: burdening, foam support molding, support sintering, film layer preparation and firing. The pure foam silicon carbide support membrane tube provided by the invention can be used in oxidizing atmosphere and reducing atmosphere, has strong acid and alkali corrosion resistance, and can be used for coal gasification chemical engineering and IGCC, PFBC coal gasification power generation, high temperature flue gas, automobile exhaust, water purification and other high and low temperature fluid filtration purification.

The invention discloses a nano cable consisting of semimetallic bismuth and metallic copper and a synthesis method thereof. The nano cable consists of the semimetallic bismuth and the metallic copper, wherein the semimetallic bismuth or the metallic copper is a nano core thread of which the diameter is between 20 and 170 nanometers; and a shell which is formed by the semimetallic bismuth or the metallic copper is coated on the outside of the nano core thread, and the thickness of the shell is between 10 and 80 nanometers. The method comprises the following steps: firstly, using a secondary anode oxidation method to obtain a through hole alumina template; secondly, using an electronic beam evaporation method and an electrodeposition method successively to synthesize a nano cable which consists of a bismuth core thread and a copper shell or the nano cable which consists of a copper core thread and a bismuth shell respectively; and finally, placing the through hole alumina template of which a through hole is provided with the bismuth core thread and the copper shell or the copper core thread and the bismuth shell inside into a strong alkaline solution, eroding the alumina template, and preparing the nano cable which consists of the semimetallic bismuth and the metallic copper of the bismuth core thread and the copper shell or the copper core thread and the bismuth shell. The cable has potential application prospect; and the method can manually control the outside diameter of the nano cable, the diameter of the thread core and the thickness of the shell, and can be widely used to synthesize the nano cable by using two different materials.

The invention relates to the technical field of ink and provides high-stability gel ink and a production method thereof with an aim to provide the high-stability gel ink stable in ink system, free from precipitation and pig skin, good in storage stability and excellent in writing performance. The high-stability gel ink is prepared from, by weight, 10-40% of a humectant, 1-8% of a dispersing agent, 0.1-1% of a lubricant, 20-40% of water-based color paste, 0.5-15% of a thickener, 0.01-0.1% of a corrosion remover, 0.5-5% of PH regulator and 30-60% of deionized water; wherein the water-based color paste is prepared from, by weight, 10-40% of a water soluble dispersant, 1-8% of water-based wetting agent, 20-50% of carbon black powder, 0.1-1% of a corrosion remover, 30-70% of a deionized water and 0.01-0.1% of PH regulator.

The invention discloses an optical fiber grating temperature sensor. The sensor comprises an optical fiber, a quartz tube and a ceramic cap. A regeneration optical fiber grating is prepared by conducting high-temperate annealing of 1,000 DEG C on a common optical fiber grating, before annealing, the optical fiber grating is subjected to high-temperate tubular encapsulation at first, an inner layerof an encapsulation structure is the quartz tube, an outer layer is the ceramic cap, the optical fiber grating is arranged at the top of the encapsulation structure, and the other end is bonded and fixed by adopting high-temperate glue. According to the high-temperature optical fiber grating temperature sensor with high reliability and stability, application of the optical fiber grating temperature sensor in the high-temperature environment of 1,000 DEG C is successfully achieved, and the sensor has high measurement precision and high-temperature stability and is suitable for temperature measurement in the high-temperature fields such as aeronautics and astronautics, petroleum electric power and chemical industry smelting.

The invention discloses an adhesive for a nylon mobile phone case and low-temperature silica gel as well as a production method and an application method of the adhesive and relates to the technical field of adhesives. The production method of the adhesive comprises steps as follows: evenly dispersing 10-11% of a low-temperature silica gel base material, 85-90% of a diluent and 2% of a coupling agent by weight, and adding 1% of a curing agent before usage to obtain the adhesive. The production method of the adhesive is simple and easy to implement, the nylon case and the low-temperature silica gel can be well adhered to each other by the aid of the adhesive produced with the method, and the silica gel and the nylon case are ensured to have very high adhesive force and can pass related tests; during usage of the adhesive, the adhesive is sprayed on the nylon case firstly, the thickness is in a range of 10-11 mu m, the nylon case is left to stand at the normal temperature for 10-15 min and baked at the temperature of lower than 95 DEG C for 9-11 min, the case taken out is required to be molded with the low-temperature silica gel through oil pressure within the expiry date of the adhesive, and the process of adhesion of the nylon case and the low-temperature silica gel by the aid of the adhesive is simple and easy to implement.

The invention discloses a white water-based alkali-resistant sealing primer and a preparation method thereof. The sealing primer and the preparation method have the beneficial effects that after-tack can not be caused when boards made from magnesite materials are stacked after being brushed with the white water-based alkali-resistant sealing primer by adding cellulose ether, titanium dioxide, kaolin, ground calcium carbonate and other substances to alkali-resistant sealing emulsion and regulating the ratio; the white water-based alkali-resistant sealing primer is low in formula cost, has very strong after-tack resistance, alkali resistance, sealability and freeze-thaw stability, can achieve the waterproof and alkali resistant effects and avoids the problem of after-tack in the production processes of the boards made from magnesite materials; the preparation method of the white water-based alkali-resistant sealing primer is simple, is easy to implement and has very high practicability.

The invention discloses fadeless mineral pigment for painting. The fadeless mineral pigment is prepared from the following components in percentage by weight: 34.29% of mineral powder, 3.02% of epoxy resin, 0.21% of composite phosphate, 0.52% of superfine barium, 1.20% of leveling agent, 0.80% of modified starch, 0.10% of graphene, 1.2% of titanium dioxide, 0.8% of sea mud, 0.5% of wax powder, 0.5% of sepiolite powder and the balance of deionized water. In the invention, the components are relatively simple, and the preparation method is easy to realize; and by adopting the special-formula pigment, the product does not fade forever.

The invention discloses a high-viscosity asphalt material for purifying automobile tail gas, and a preparation method thereof. The high-viscosity asphalt material comprises the following raw materialcomponents in parts by weight: 100 parts of matrix asphalt, 5-15 parts of a styrene-butadiene block copolymer, 1-20 parts of aromatic-rich oil, 0.1-1 part of a stabilizing agent, 1-20 parts of a porous carbon material, and 1-20 parts of an asphalt modifier, wherein the asphalt modifier uses a lanthanum-based metal oxide as a carrier and uses a transition metal oxide as a catalytic active component, and the use amount of the transition metal oxide is 5-100% of the mass of the lanthanum-based metal oxide. The high-viscosity asphalt material disclosed by the invention can efficiently and permanently purify nitrogen oxides and other main pollutants in automobile tail gas within a pavement temperature range in the presence or absence of sunlight while effectively reduces urban road surface noise pollution, enhances road surface friction force and inhibits water film generation, and can be widely applied to construction of modern asphalt road surfaces and sponge cities.

The invention relates to the field of porous ceramic materials, and specifically relates to a dual-gradient pore-structure sialon and silicon carbide combined membrane tube and a preparation method thereof. The membrane tube material is composed of sialon and silicon carbide. The membrane tube has a dual-gradient filtering structure composed of a support body layer and a surface membrane layer. The support body layer is composed of a combination of sialon produced through a reaction and coarse silicon carbide grains, and has an average pore size of 10-50mum. The surface membrane layer is composed of a combination of sialon produced through a reaction and fine-particle silicon carbide grains, and has an average pore size of 0.1-5mum. An overall porosity of the membrane tube is within a range of 40-50%. The preparation method of the membrane tube sequentially comprises the steps of material preparation, support forming, membrane layer preparation and firing. Isostatic pressing is adopted in the forming step, wherein a forming pressure is controlled at 100-150MPa. The firing temperature is controlled at 1650-1850 DEG C, and a temperature maintaining time is 3-5h. The method is easy to realize. With the method, product performance can be ensured. The membrane tube provided by the invention has the advantages of high application temperature, high acid corrosion resistance and high alkali corrosion resistance. The membrane tube can be used in filtration purification of various fluids with high temperature or low temperature, such as high-temperature high-press gas filtration dedusting, water purification and the like.

The invention discloses a side-thickened polyamic acid film, tape casting equipment and a preparation method thereof, and belongs to the field of film preparation. The two lateral side parts of the film gradually increase with the thickness close to the outer edge within an X-wide range, X is 20-200 mm, and the thickness distribution of the film is symmetrical relative to the longitudinal central line of the film. The openness of a lip within a Y length range at the two side parts of a forming mold lip of the tape casting equipment gradually increases with the openness close to the outer edge, and the openness of the lip is symmetrical relative to the longitudinal central line of the lip. The preparation method comprises adjusting the bolt of the forming mold lip to obtain the necessary forming mold lip. According to the invention, since the thicknesses of the two side parts of the film are increased, the strength is increased, the strength of the film at an acting point of a clamping device in a subsequent procedure is increased to avoid unclamping or releasing or edge damage caused by clamping damage and pull damage, so that the product yield is greatly improved; the tape casting equipment and the preparation method disclosed by the invention are easy to achieve, and only the lip bolt is adjusted to increase the openness at the two sides of the lip.

The invention relates to a high-activity catalyst used for hydrogen production by dehydrogenation of an organic hydrogen storage compound and reduced in noble metal consumption, and a preparation method thereof. The catalyst comprises Pt, a non-noble metal active component, aluminum oxide and modified metal oxide, wherein the modified metal oxide is titanium oxide and / or zirconium oxide; and the value of eta of the modified metal oxide is less than 0.3, the value of theta of the modified metal oxide is greater than or equal to 5, the value of eta is equal to a ratio of the weight percentage ofa crystalline phase modified metal oxide in a carrier composition to the chemical composition weight percentage of the modified metal oxide in the carrier composition, and the value of theta is equalto a ratio of the weight percentage of the modified metal oxide on the surface of the carrier composition to the chemical composition weight percentage of the modified metal oxide in the carrier composition.. The preparation method comprises the following steps: preparing the carrier composition containing the aluminum oxide and the modified metal oxide, conducting dipping and then performing roasting. The catalyst has high dehydrogenation activity and selectivity under the condition that noble metal consumption is reduced.

The invention discloses a micro-emulsion makeup removal jelly and a preparation method of same, wherein the micro-emulsion makeup removal jelly includes: caprylic / capric triglyceride, glyceryl triethylhexanoate, a micro-emulsifier and a skin-cleaning agent, olive fruit oil, tocopheryl acetate, an acrylamidedimethyltaurine ammonium / VP copolymer, sodium hyaluronate, a preservative, PPG-9 diglycerin ether, glycerin, butanediol, ethylhexylglycerin, caprylyl glycol, essences, and the balanced being deionized water. The micro-emulsion makeup removal jelly has good makeup removal effect, can completely remove makeup with no residue, is convenient to use, and has the effects of moisturizing and nourishing skin. The preparation method is easy to carry out and allows large-scale mass production.

The invention discloses a high-viscosity asphalt modifier, a high-viscosity asphalt material and preparation methods of the high-viscosity asphalt modifier and the high-viscosity asphalt material. The high-viscosity asphalt modifier takes a carbon nanotube as a carrier and a transition metal oxide as a catalytic active component; the using amount of the transition metal is 10%-100% of the mass of the carbon nanotube. The outer diameter of the carbon nanotube is 50-100 nm, the purity is greater than 95 wt%, and the specific surface area is greater than 100 m < 2 > / g. The invention also provides a high-viscosity asphalt material, and 1-20 parts of the high-viscosity asphalt modifier is added into every 100 parts of matrix asphalt. The high-viscosity asphalt material disclosed by the invention can efficiently and durably purify main pollutants such as nitrogen oxides in automobile exhaust in a pavement temperature range no matter whether sunlight exists or not, and meanwhile, the noise pollution of urban pavements is effectively reduced, the friction force of the pavements is enhanced, the generation of water films is inhibited, and the product can be widely applied to construction of modern asphalt pavements and sponge cities.

The invention provides a composite positive electrode material and a preparation method thereof. A lithium ion battery positive electrode substrate material is combined and coated by two substances of AlF3 and AlPO4, the AlF3 is used as a protection layer to prevent corrosion of hydrofluoric acid on the positive electrode substrate material, the cycle stability is improved, the AlPO4 is similarly used as a protection layer for coating, the initial charge-discharge efficiency is improved, the cycle property is improved, the integral electrochemical performance of a lithium ion battery is improved, and moreover, the preparation method of the composite positive electrode material is simple and is easy to implement.

The invention provides a semiconductor device and a manufacturing method thereof, and an electronic device, and relates to the technical field of semiconductors. The manufacturing method comprises a device substrate and forming a front-end device on the front side of the device substrate; forming an interlayer dielectric layer through deposition to cover the front-end device and the front side of the exposed device substrate; forming a patterned mask layer on the interlayer dielectric layer in order to cover an area corresponding to the front-end device and make the area except the front-end device be exposed; etching the interlayer dielectric layer in the exposed area except the front-end device and part of the device substrate sequentially by taking the patterned mask layer as the mask to form a sealing ring opening; removing the patterned mask layer; and forming a metal layer through deposition to fill the sealing ring opening in order to form a sealing ring arranged in the area except the front-end device. According to the manufacturing method, the sealing ring is formed in a way of surrounding the front-end device, and is helpful for releasing the stress during the subsequent cutting process, damage to the chip can be prevented, and the yield rate and the performance of the semiconductor device are increased.

The invention discloses a high-nickel lining material for a sintering furnace. The high-nickel lining material is prepared from the following raw materials: 12 to 23 parts of high-purity quartz, 6 to15 parts of fused silica, 18 to 30 parts of corundum, 25 to 40 parts of bauxite, 7 to 16 parts of spinel, 5 to 13 parts of magnesite, 3 to 9 parts of alumina, 2 to 7 parts of magnesium oxide, 2 to 6 parts of silicon carbide and 1.5 to 4.2 parts of an agglutinant. The prepared refractory material has the advantages of high strength, high softness under load, chemical stability, erosion resistance,long service life, low cost, simple production process, as well as safety and convenience in use.

The invention discloses cleansing oil which comprises the following components in parts by weight: 50-80 parts of oil, 10-35 parts of a nonionic surfactant, 5-10 parts of silica silylate, 1-5 parts ofwater, 0.1-4 parts of a skin conditioner, 0.01-0.5 part of an antioxidant and 0.01-0.2 part of plant extract. The silica silylate in specific content is added into the nonionic surfactant of specificcontent and oil of specific content, and the water, the antioxidant, the skin conditioner and the plant extract of specific content are taken as auxiliary materials, so that the prepared cleansing oil has an excellent cleansing effect by virtue of synergistic effects of the various components, and heavy makeup can be easily cleansed. Moreover, skin allergy and irritation can be avoided, and the cleansing oil is convenient to use. The preparation method is easy to realize, and large-scale volume production can be realized.

The invention relates to the field of metal surface treatment, in particular to a preparation method of a steel-based corrosion-resistant super-hydrophobic coating. The preparation method thereof comprises the following steps: dissolving a silanol compound or titanium alcohol in absolute ethyl alcohol, violently stirring by using citric acid as a catalyst and a constant-temperature magnetic stirrer to completely hydrolyze the silanol compound or titanium alcohol compound to prepare sol, and mixing the prepared sol with a pretreated CNTs dispersion liquid; spraying a mixed solution on the surface of the impurity-removed steel in a spray drying manner, then putting a sample into a tubular furnace for curing reaction, and then taking out the sample, so as to obtain the corrosion-resistant super-hydrophobic coating. The preparation method is low in synthesis temperature, uniform in solution dispersion, easy in reaction, simple and convenient to operate, environment-friendly and fluoride-free, the obtained steel-based corrosion-resistant super-hydrophobic coating is excellent in acid and alkali corrosion resistance, the contact angle can still be kept at 150 degrees or above after the coating is soaked in an acid and alkali solution for 12 hours, and the coating has important value in the actual application process of steel.

The invention belongs to the technical field of sewage treatment and provides a powdery activated carbon carrier and a preparation method and application thereof. The mass percent of water in the powdered activated carbon carrier is 2.8-3.0%; the mass percent of the ash content is 11.8%-12.2%; the iodine value is 954-984 mg / L; the specific surface area is 850-855 m <2> / g; the stacking density is 0.54-0.59 g / cm <3>; the pH value is 6.8-8.5; and the mass of the activated carbon particles with the particle size of 200-325 meshes in the powdery activated carbon carrier is greater than or equal to80%. The powdered activated carbon carrier can be directly added, and is simple to operate, long in service life, low in price and wide in application range; the powdery activated carbon carrier is large in specific surface area, so that the number of immobilized microorganisms is larger, and when the powdery activated carbon carrier carrying COD degrading bacteria is added into wastewater with high COD content, an excellent treatment effect is obtained.

The invention discloses a high-viscosity asphalt material for purifying automobile exhaust and a preparation method of the high-viscosity asphalt material. The high-viscosity asphalt material comprises the following components in parts by weight: 100 parts of matrix asphalt; 1-20 parts of an asphalt modifier; 3-20 parts of biomass heavy oil; 5-18 parts of a thermoplastic block copolymer; 0.1-1 part of a stabilizer; and 1 to 15 parts of DOA. The asphalt modifier takes a lanthanide metal oxide as a carrier and a transition metal oxide as a catalytic active component. The high-viscosity asphalt material disclosed by the invention can efficiently and durably purify main pollutants such as nitrogen oxides in automobile exhaust in a pavement temperature range no matter whether sunlight exists or not, and meanwhile, the noise pollution of urban pavements is effectively reduced, the friction force of the pavements is enhanced, the generation of water films is inhibited, and the material can be widely applied to construction of modern asphalt pavements and sponge cities.

The invention discloses an RFID printed antenna and a preparation method thereof, The RFID printed antenna comprises a substrate, a protective plate, a printed antenna and a polymer film layer. The printed antenna is a printed conductive antenna printed between the substrate and the protective plate by using conductive ink. A matching positioning protrusion and a positioning groove are arranged between the protective plate and the substrate. The polymer film layer is sealed and coated on the exterior of the substrate and the protective plate. The invention has unique structural hierarchy design, good waterproof, folding-proof, fire-proof and electric conductivity performance, wide application range, and the preparation method is easy to realize, which is conducive to reducing the production cost of enterprises and popularizing the RFID electronic tag technology.

The invention discloses an Anquer oral liquid, which comprises the following components in parts by weight: 350 to 390 parts of fig, 350 to 390 parts of wolfberry, 60 to 90 parts of honey, 15 to 25 parts of glucose syrup, and water with an acceptable amount. The oral liquid has the advantages that the taste is good, the oral liquid is easy to prepare, and the oral liquid can enhance the immunity. The invention further relates to a preparation method of the oral liquid.

The invention discloses an organic tea fertilizer and a preparation method thereof. The organic tea fertilizer is prepared by composting and then processing, by weight, 75-80 parts of cassava alcohol residues, 6-10 parts of soybean molasses, 3-8 parts of shrimp peptides, 3-7 parts of iron steel slag powder, 1-3 parts of oyster shell powder, 0.8-1.2 parts of zinc sulfate, 0.8-1.2 parts of manganese sulfate, 0.8-1.2 parts of magnesium sulfate and 0.4-0.6 part of borax. The organic tea fertilizer can be used for replacing common fertilizer to produce high-quality tea leaves with the high organic matter content; according to the preparation method, the needed fermentation time for preparing the organic tea fertilizer can be shortened, implementation is convenient, and the labor is saved.

The invention discloses a rabbit Eimeria medium precocious strain and its preparation method and application. The method comprises: obtaining sporulated oocysts of a virulent Eimeria rabbit medium strain through collection, separation and purification of rabbit feces, Infect the sporulated oocysts of the virulent strain of Eimeria mesocarpus in the weaned rabbits, and obtain the Nth generation Eimeria mesocarpa oocysts with shortened latent period, that is, the Eimeria mesocarpus oocysts. The precoccus mesicum strain; compared with the Eimeria mesocarpus strain in the field, the Eimeria mesocarpus precoccus strain prepared by the present invention is pure and has weak pathogenicity, and can be directly used to prepare vaccines and the preparation method of the rabbit Eimeria mesodium precoccus strain disclosed by the present invention is simple and easy to implement.