169 results about "Red Clover" patented technology

The present invention relates to compositions and methods for modulating hair growth or regrowth. The compositions of the present invention comprise extracts of one or more of the following: Boswellia serrata, Undaria pinnatifida, green tea (e.g., Camellia sinensis), shiso, Pureraria mirifica, luteolin (e.g. Perilla ocymoides leaf extract), astilbin, vitamin E, amentoflavone, tetrahydropiperine, licochalcone, astaxanthin, red clover, Brassica juncea, unfermented green rooibos, enzyme CoQ10, salvia, ximenynic acid, hops oleoresin, apple, soy, saw palmetto, or ellagic extract, or any derivative thereof. In particular, the compositions and methods of the present invention can be used to stimulate or increase hair growth and / or prevent or slow the loss of hair by having one or more of the following functions: (a) inhibiting synthesis of DHT; (b) inhibiting proteasomal activity; (c) inhibiting IL-1 activity; (d) increasing vascularization; (e) increasing expression of vascular endothelial growth factor; (f) increasing expression of keratinocyte growth factor; (g) inhibiting inflammation; or (h) acting as an antibacterial.

The invention discloses fermented fruit and vegetable composition containing probiotics and traditional Chinese medicine extract and a preparation method of the fermented fruit and vegetable composition. The fermented fruit and vegetable composition comprises fermented fruit and vegetable, fermented or non-fermented traditional Chinese medicine or the traditional Chinese medicine extract, the prebiotics, probiotics and an auxiliary, wherein the prebiotics are formed by one or more oligosaccharides and the probiotics comprise one or more of lactobacillus, bifidobacterium and streptococcus; the fruit and vegetable comprise one or combination of pumpkins, white gourds, kiwi fruits, soybeans, papayas, purple sweet potatoes, carrots, Chinese chestnuts, Chinese yam, maca fruit, pearl barley, Wolfiporia extensa, Angelica sinensis, kudzu vine roots and lotus seeds; the traditional Chinese medicine or the traditional Chinese medicine extract is one or more of Astragalus, olive leaves, grape seeds, ginger, gardenias, saw palmetto, pumpkin seeds, pomegranate seeds, pomegranate bark, raspberries, Cistanche deserticola, black cohosh, red clover or extract thereof. The fermented fruit and vegetable composition is food, a medicine or a health care product with the efficacy of regulating intestinal flora, boosting immunity, improving sleeping function and the like.

A melanin preparation as an immunostimulatory agent from at least one of the following botanicals: Echinacea, American ginseng, black walnut, green tea, Parthenium integrifolium, Korean ginseng, alfalfa sprouts, ginger, goldenseal, red clover, dandelion, black cohosh, licorice, chamomile, milk thistle, alfalfa, horsetail, astragalus, gotu kola, feverfew, valerian, hawthorn, rosemary, saw palmetto, ephedra, pau d'arco, ginkgo, garlic, St. John's wort, Agaricus bisporus (common mushroom), Agaricus bisporus brown strain (portabella mushroom), Lentinus edodes (shiitake mushroom) or Boletus edulis (porcini mushroom). Also disclosed is methods of treating a subject requiring immune mediation comprising administering to said subject a therapeutically effective amount of a melanin preparation from any one of the following botanicals: Echinacea, American ginseng, black walnut, green tea, Parthenium integrifolium, Korean ginseng, alfalfa sprouts, ginger, goldenseal, red clover, dandelion, black cohosh, licorice, chamomile, milk thistle, alfalfa, horsetail, astragalus, gotu kola, feverfew, valerian, hawthorn, rosemary, saw palmetto, ephedra, pau d'arco, ginkgo, garlic, St. John's wort, Agaricus bisporus (common mushroom), Agaricus bisporus brown strain (portabella mushroom), Lentinus edodes (shiitake mushroom), Boletus edulis (porcini mushroom).

An antioxidative composition containing: (a) an active component selected from the group consisting of (i) at least two extracts selected from the group consisting of Vaccinium myrtillus, Trifolium pratense, Vitis vinifera and Thea vinensis; (ii) at least two active components selected from the group consisting of anthocyanosides, isoflavone glucosides and polyphenols; and (iii) mixtures thereof; and (b) a co-active component selected from the group consisting tocopherol, ascorbic acid and mixtures thereof.

The invention provides a brackish water and fresh water rotation irrigation method for a saline and alkaline land. Irrigation includes irrigation in the seedling period, irrigation in the growing period and irrigation in the cutting period. According to irrigation in the growing period, the ratio of rotation irrigation number of times of the organic-matter-enriched brackish water to that of the fresh water is 1:2, the land is irrigated once every 8-10 days, and the one-time irrigation volume is 450-500 m<3> / hectare. A preparing method for the organic-matter-enriched brackish water includes the step that organic-matter-enriched fertilizer is dissolved in the brackish water. The organic-matter-enriched fertilizer comprises, by weight, 24-26 parts of seaweed residues, 10-12 parts of chicken manure, 1-3 parts of microbial agent, 2-4 parts of magnesium-containing phosphate, 5-8 parts of fulvic acid and 2-3 parts of glutelin cystine. The irrigation method is adopted to plant red clover, the planting survival rate is 98.6-99.2%, and the annual output of red clover fresh grass is 6800-6900 kg / mu.

A pharmaceutical formulation of a calcium salt and a dry plant extract in the form of a coated tablet, in which the formulation has a core of at least one dry plant extract, enveloped by at least one coating of at least one calcium salt. The plant extracts for the core may be selected from: Vitex agnus castus (chaste tree); Belamcanda chinensis (leopard lily); Cimicifuga racemosa (black cohosh); Trifolium pratense L. (purple trefoil); Oenothera biennis hom. (primrose); Glycine soja (soy bean); Serenoa repens (saw-palmetto); Urtica dioica (stinging nettle), in particular its root; Cucurbita pepo (pumpkin), in particular its seed; Pygeum africanum; as well as suitable mixtures of these. Methods for the use of the formulation in treating osteoporosis and for manufacturing the formulation are provided.

The invention discloses a method for improving growth and drought-resistant ability of wheat by using arbuscular mycorrhizal fungi to bring the reciprocal symbiosis relation between AM fungi and host plants under drought stress into play reasonably and efficiently. According to the method, the AM fungi having a close symbiotic relation with the wheat are selectively used, and the symbiotic relation between the AM fungi and the wheat is built in a condition control mode to promote the wheat growth and improve drought adaptability. The AM fungi comprise one of glomus monosporum and acaulospora laevis, the two kinds of AM fungi are respectively propagated in an expanding mode in an expanding propagation matrix by using red clovers, and then two AM fungi inoculants and the wheat are cultured together in a symbiotic culture medium. The effective path for profitable symbiosis of the AM fungi and the host plants in adversity conditions is provided, the infection and symbiosis relation with the host plants of the AM fungi is improved in a man-made mode, and the yield of dry crops is improved.

The invention discloses feed for promoting growth and development of broilers and a preparation method thereof. The feed is prepared from the following raw materials in parts by weight: 170-180 parts of dried sweet potato, 30-40 parts of corncob, 12-14 parts of dried distillers grain, 8-12 parts of red clover, 6-8 parts of egg-shell meal, 7-9 parts of sunflower meal, 10-15 parts of sargassum thunbergii, 5-7 parts of coconut shell flour, 4-5 parts of garlic powder, 15-20 parts of field-snail-meat, 20-30 parts of setosa immature stems, 16-18 parts of banana skin, 10-14 parts of ulva, 9-11 parts of kelp, 5-7 parts of chrysanthemum nankingense, 15-17 parts of water chestnut stems, 12-15 parts of coffee leaves, 2-3 parts of salt, 8-10 parts of Poria cocos, 7-9 parts of lycium barbarum, 3-5 parts of rhizoma curculiginis, 2-4 parts of isatis root, 1-3 parts of wahlenbergia marginata, 6-8 parts of fructus amomi, 0.5-0.7 part of choline chloride, 3-5 parts of medical stone powder and 7-9 parts of nutrition additives. The feed disclosed by the invention has the effects of regulating the metabolism of body cells, increasing the appetite of broilers, increasing the feed intake, improving the digestive absorption capacity and promoting growth and development, the weight of the broilers can be effectively increased, and the growth cycle of the broilers is shortened. Moreover, diseases of the broilers can be reduced, and the death rate of the broilers is reduced.

The invention discloses a plant feed additive for preventing porcine diarrhea and a preparation method, belonging to the field of feed additives. One plant feed additive for preventing porcine diarrhea mainly comprises smashed folium cortex eucommiae, smashed lophatherum gracile, smashed poria cocos, smashed honeysuckles, smashed purslane, smashed dandelion, smashed liquorice, smashed orange peels and smashed red clovers. Another plant feed additive for preventing porcine diarrhea is mainly prepared by performing compound extraction on folium cortex eucommiae, lophatherum gracile, poria cocos, honeysuckles, purslane, dandelion, liquorice, orange peels and red clovers. According to the plant feed additive for preventing porcine diarrhea, the immunity of live pigs can be obviously improved, the diarrhea rate is lowered and the feed conversion rate is obviously increased even if a pig feed does not contain antibiotics and any hormone; quick growth of the live pigs is promoted, and requirements of people for safe production of poultry products are met.

The present invention provides methods for increasing peroxisome proliferator-activated receptor-gamma (PPARγ) activity and / or endothelial nitric oxide synthase (eNOS) activity in a subject by administering to the subject a plant extract or plant juice from thyme, oregano, clove, nutmeg, red clover, bay leaves, red onion or grapes.

The invention discloses a process for extracting isoflavone substances from trifolium pratense, which relates to the field of extraction of effective substances from plants. The isoflavone substances are valuable medicinal raw materials, but a complete extraction process has not been reported. The invention disclosed a complete extraction process, which comprises the following steps: using ethanol solution to perform hot reflux for primary extraction to obtain an ethanol extract, using sodium hydroxide solution to perform hydrolysis and purification, and then using hydrochloric acid solution to perform aqueous layer treatment, performing extraction through ethyl acetate, and reducing the pressure and distilling the mixed solution to obtain crude products of the isoflavone substances. The process has the advantages of high extraction efficiency, less investment in equipment, quick start of engineering, low cost and easy popularization.

The invention relates to a method for extracting the isoflavone from the red clover. The invention can obtain the high-purity isoflavone products through the steps of one-step hydrolysis method, water precipitation base-dissolving method, membrane separation, and column chromatography, etc. The invention carries out the separation and purification by adopting the membrane separation technology, thus on one hand enhancing the purity of the isoflavone glycosides in the products and on the other hand driving the sample solution before the macroporous resin column chromatography to be purified, lightening the damage of the resin and extending the using period of the resin. Furthermore, the application of the nanofiltration technology drives the sample solution before the resin column chromatography to be directly sampled without needing to be concentrated so as to simplify the working procedure. The process is simple, can be suitable for the industrialized production, and the edible grade ethanols are only adopted as the solvents in the process of preparation, thus causing few contaminations and requiring low cost.

The invention provides a cosmetic containing composite plant extract. The cosmetic comprises the following component in percentage by mass: 0.01% to 10% of composite plant extract, wherein the composite plant extract is formed by mixing one or several of rosa gallica flower extract, leontopodium alpinum flower extract, white lily flower extract, daffodil flower extract, trifolium pretense flower extract, chrysanthellum indicum flower extract, flos magnoliae flower extract, lonicera japonica flower extract, jasminum officinalis flower extract and opuntia ficus-indica flower extract. The preparation method comprises the following steps of uniformly mixing and stirring all raw materials at the temperature of 80-85 DEG C, and standing for a period of time; cooling and lowering temperature to 30-35 DEG C, filtering, discharging, and checking; after qualifying, packaging. The cosmetic containing composite plant extract has the advantages that the effects of supplementing water, maintaining moisture and soothing skin are realized; the requirements of people on water supplementing, moisture maintaining and skin soothing are met.

An extract of red clover herb rich in isoflavone is prepared from fresh red clover herb through extracting in alcohol, recovering alcohol, concentrating the extracted liquid, laying aside to obtain deposit, and drying.

The invention discloses a botanical insecticide capable of preventing and treating aphids and acarids. The main ingredient of the botanical insecticide capable of preventing and treating aphids and acarids is a trifolium pratense extract. A trifolium pratense botanical pesticide provided by the invention has obvious contact toxicity on the aphids and the acarids, is low in pesticide resistance generation possibility, is environment-friendly and is safe to non-target organisms such as people and livestock. Main functional ingredients are separated and identified as flavonoid compounds, so that a premise is provided for further development and utilization. The botanical insecticide is rich in plant resources and simple in preparation process and has favorable development and application prospects and economic values in agricultural production.

A disclosed fat-reducing externally-applied cream is prepared from the following raw materials in parts by weight: 5-10 parts of hot pepper, 6-12 parts of ginkgo biloba, 10-20 parts of folium nelumbinis, 4-6 parts of mint leaf, 2-6 parts of retinervus luffae fructus, 4-8 parts of herba centellae, 8-12 parts of peach blossom, 2-4 parts of trifolium pratense l. extractive, 2-4 parts of citrus aurantium extractive, 5-10 parts of radix et rhizoma rhei, 6-10 parts of caulis spatholobi, 10-12 parts of evening primrose oil, 2-8 parts of carnitine, 10-20 parts of anhydrous sodium sulfate, 10-20 parts of glycerol, 5-10 parts of liquid paraffin, 4-8 parts of isopropyl myristate, 2-4 parts of squalane, and 0.1-1 parts of germall. After being persistently used, the fat-reducing externally-applied cream is capable of promoting tissue blood circulation, accelerating fat burning and giving play to effect of reducing fat, and also is capable of promoting absorption of nutrients by skin, moistening and nourishing skin and increasing skin elasticity. Additionally, the fat-reducing externally-applied cream is capable of fortifying stomach and removing food stagnation, clearing heat and detoxifying, and does not have any toxic and side effects.

The invention relates to a method for producing trifolium pratense L. isoflavones, which is characterized by comprising the following steps of: a, extracting, namely extracting trifolium pratense L. by using methanol; b, filtering, namely standing extract in a storage tank, and filtering to remove slag; c, decolorizing and concentrating, namely decolorizing by using an activated carbon column, concentrating, extracting by using petroleum ether and ethyl acetate respectively, and concentrating to obtain a dry product; d, regulating the ph value, namely dissolving the dry product in NaOH aqueous solution, and controlling the ph value to be between 7 and 9; e, loading to a column, namely loading AB-8 macroporous adsorption resin to the column, eluting by using methanol solution, and evaporating until solution is dried; and f, extracting and crystallizing, namely dissolving the dry product in the NaOH aqueous solution, extracting by using the ethyl acetate, concentrating to reach certain volume, and performing cooling crystallization. An isoflavone product with high purity is obtained through steps of extracting solution and column chromatography solution recycling, two-time extraction, column chromatography and the like; a large quantity of solvent, electricity and heat are saved, and the service cycle of resin is prolonged; and by the process, product quality is improved, and energy consumption is reduced.

The invention discloses essence with effects of controlling oil and shrinking pores. The essence is characterized by containing oil-controlling composition and pore-shrinking composition, wherein theoil-controlling composition contains a hamamelis virginiana extract and a trifolium pratense flower extract; the pore-shrinking composition contains an achillea millefolium extract and a fomes officinalis extract. The oil-controlling composition and the pore-shrinking composition are added to the essence, immediacy and long-term effect are combined, immediate rapid makeup can be realized, after long-term use, the pores are tightened and shrunk, and meanwhile, coarse pores are relieved from the source.

The invention discloses a method for preparing atomized liquid for treating infantile asthmatic suffocating pneumonia. The atomized liquid comprises gleditsia fruit, loquat leaf, European hop flower, Chinese waxgourd semen, common bluebeard herb, platycodon root, red clover, whiteflower hogfennel root and borneol which serve as raw materials. The method is characterized by comprising the following steps of: (1) extracting the loquat leaf, the European hop flower and the common bluebeard herb by a supercritical fluid extraction method to obtain volatile oil; (2) crushing the gleditsia fruit and the borneol into superfine powder; (3) decocting the red clover, the whiteflower hogfennel root, the Chinese waxgourd semen and the platycodon root in water twice, filtering, mixing filtrates, and concentrating at the temperature of 80 DEG C until the relative density is 1.1 to obtain a water extracting solution; and (4) stirring the volatile oil obtained in the step (1), the superfine powder obtained in the step (2) and the water extracting solution obtained in the step (3) uniformly, standing at normal temperature for 12 hours, and filtering to obtain liquid medicine. Clinical experiments prove that the atomized liquid prepared by the method has an obvious treatment effect, and the hospital stays can be shortened.

The present invention relates to compositions and methods for modulating hair growth or regrowth. The compositions of the present invention include extracts of one or more of the following: Boswellia serrata, Undaria pinnatifida, green tea (e.g., Camellia sinensis), shiso, Pureraria mirifica, luteolin (e.g. Perilla ocymoides leaf extract), astilbin, vitamin E, amentoflavone, tetrahydropiperine, lichochalcone, astaxanthin, red clover, Brassica juncea, unfermented green rooibos, enzyme CoQ10, salvia, ximenynic acid, hops oleoresin, apple, soy, saw palmetto, or ellagic extract, or any derivative thereof.

The invention relates to a breast enlargement composition, breast enlargement lotion and a preparation method thereof. The breast enlargement composition comprises the following active components in parts by weight: 1-5 parts of a cladosiphon okamuranus extract, 0.05-2 parts of a Flos Chrysanthemi extract, 0.05-2 parts of a Herba Centellae extract, 0.01-1 part of an extract of the root of Radix Glycyrrhizae, 0.01-1 part of a tea leaf extract, 0.05-2 parts of an extract of the root of Rhizoma Polygoni Cuspidati, 0.05-3 parts of a Radix Puerariae extract, 0.05-2 parts of an extract of the root of Radix Scutellariae, 0.1-2 parts of a cimicifuga racemosa root extract, 0.05-2 parts of soybean isoflavone, 0.01-1 part of an extract of the leaf of Herba Rosmarini Officinalis, 0.5-3 parts of a Radix Angelicae Sinensis extract, 0.5-3 parts of a Punica granatum L. extract and 0.05-1 part of an extract of the flower of Herba Trifolii Pratentis. The breast enlargement composition and the breast enlargement lotion have good breast enhancement effect, and is safe, toxic-free and nonirritating.

The invention provides a novel special liquid fertilizer for rice capable of comprehensively controlling plant diseases and insect pests, and a preparation method thereof. The novel special liquid fertilizer is prepared from the following components: 5 to 15 parts of urea-ammonium nitrate solution, 5 to 15 parts of ammonium polyphosphate solution, 5 to 10 parts of potash fertilizer, 0.1 to 2 parts of microelement, 20 to 50 parts of water, 1 to 10 parts of homemade plant pesticide extracting solution, 1 to 2 parts of soil conditioner, 1 to 5 parts of natural activity organic materials, and 1 to 5 parts of natural surfactant, wherein the homemade plant pesticide extracting solution is prepared from mixing trifolium pratense, folium artemisiae argyi, herba houttuyniae, semen persicae and black false hellebore in proportion, and extracting with water. The preparation method comprises the steps of adding the prepared urea-ammonium nitrate solution and the ammonium polyphosphate solution in proportion according to a formula into a mixing tank; then adding the other metered materials into the mixing tank; stirring, dissolving and filtering to prepare the liquid fertilizer. The liquid fertilizer provided by the invention is convenient to use and good in effect, and is a special multi-functional environment-friendly liquid fertilizer for the rice.

A new composition and method are described for female fertility therapy. In one alternative, the composition utilizes three nutritional supplements, grape seed, para amino-benzoic acid (PABA), and red clover. When it is administered to females as fertility therapy following the recommended dosage, interleukin-6 is inhibited by the dose of grape seed, blood levels of folic acid are supported by the dose of PABA, and the dose of red clover provides phytoestrogenic isoflavones.

The invention relates to the application of isoflavones red clover (form 1) and genistein (form 2). The invention is utilized for the preparation of medicine through strengthening the reverse cholesterol transport processed treatment and / or preventing the atherosclerosis. The medicine of strengthing the reverse cholesterol transport processed treatment and / or preventing the atherosclerosis comprises the medicine presented the liveness through the up-regulation of the high density lipoprotein receptor CLA-1 / SR-BI and the ATP cassette antigen ABCA1. The invention also relates to the drug composition of strengthening the reverse cholesterol transport processed treatment and / or preventing the atherosclerosis, the active constituents efficient chosen from the isoflavones red clover (form 1) and genistein (form 2) provided on the drug composition and optional carrier which is able to be adopted by the pharmacy.

The invention relates to an ecological recovery method for vegetative cover at the mine spoil area in southern China, and the technical proposal thereof is as follows: first, the mine waste residue substrate is stationed and dug with pits, each pit is not less than 50cm *50cm*50cm, the pit is filled with soil for planting inside, the soil for planting is loess or other soil, then nursing plants, namely, one to two large leaf acacias are planted, after the large leaf acacias survive for 3 to 5 months, indigenousspecies lotus tree, psychotria, huajillo, or red clover are planted under the large leaf acacias to be used as the objective plant species. After the nursing system and the nursing plants-the objective plant species pair are established, the curing is only needed for twice to three times in early time, and finally the indigenousspecies all can be directly settled on the mine spoil area.

The invention discloses health-care sesame oil capable of maintaining beauty and keeping young and a preparation method thereof. The health-care sesame oil is characterized by being prepared from the following raw materials in parts by weight: 1350-1400 parts of sesame, 35-45 parts of almonds, 10-15 parts of sunflower seeds, 5-7 parts of hippophae rhamnoides leaves, 1-2 parts of red clover grass, 1-2 parts of Chinese roses, 1-2 parts of peach flowers, 1-2 parts of glossy privet fruits, 1-2 parts of bryophyllum pinnatum, and 2-4 parts of dendrobium. Besides the sesame, the raw materials, such as the hippophae rhamnoides leaves, the red clover grass, the Chinese roses and the peach flowers, which can maintain beauty and keep young and clear heat and remove toxicity, are added into the health-care sesame oil, so that the edible value of the sesame oil is increased, and the health-care sesame oil, disclosed by the invention, has unique dietetic therapy and health-care effects; in a production process of the health-care sesame oil, an environmentally-friendly high-efficient supercritical carbon dioxide fluid extraction technology is adopted, so that the nutrient components in the raw materials are furthest protected. The health-care sesame oil disclosed by the invention is rich in fragrance and clear and transparent, and is particularly suitable for daily health care of female consumers.

The invention discloses an eyelash growth liquid. In parts by weight, the effective raw material components of the eyelash growth liquid include: acetyl tetrapeptide-3, red clover, dextran, panthenol, thickener, and moisturizing agent One or more of stabilizers, pH regulators and preservatives; the formula of the present invention is scientific and rigorous, and the analysis of functional components is reasonable; the formula is safe, mild and non-irritating; on the one hand, it can promote the growth of eyelashes, and can make eyelashes thicker, Beautiful; on the other hand, the eyelash growth liquid of the present invention promotes eyelash growth, and also has the characteristics of moisturizing, moisturizing, refreshing appearance and non-greasy when used.

Disclosed are compositions and methods for treating symptoms associated with menopause and / or perimenopause. The compositions are based on a combination of concentrated extracts containing black cohosh, ginseng, red clover, soy isoflavones and St. John's wort, in the form of active compounds of these extracts. The treatment regimen, entail orally administering to a human subject suffering from symptoms of menopause and / or perimenopause, an effective dosage in effective amounts of the noted composition.

The invention discloses a plant nursing composition and a preparing method and application thereof. The plant nursing composition comprises an extract of radix gentianae, an extract of stems of maguey, an extract of chlorella and an extract of flowers of trifolium pratense. The plant composition contains the extract of radix gentianae, the extract of stems of maguey, the extract of chlorella and the extract of flowers of red clover, wherein the extract of radix gentianae helps to improve the biochemical function of the skin tissue, the extract of stems of maguey and the extract of flowers of red clover both have the anti-inflammatory effect, can protect hair follicles of the scalp, and improve the tenacity and elasticity of the hair; the extract of chlorella can promote detoxication and discharge of harmful substances in the environment, the mixture of the four plant extracts is adopted for replacing common scalp relieving agents, all the components play a synergistic effect, full playcan be given to the effects of all the components, the scalp is relieved, the situation that the scalp has pruritus and erythema cannot occur, the effect of scalp nursing is achieved, and thus the plant nursing composition can be widely applied to preparing various hair washing and caring products.

The invention relates to a production technique for extracting and separating isoflavone from red clover, comprising the following steps: the dry red clover raw material is crushed and extracted by high degree alcohol in a dynamic way; after being filtered, the extracted liquid medicine is decompressed and concentrated to have no alcohol smell and then extracted by the mixed solvent formed by moderate polar hydrophobic solvent A and weak polar solvent B until active ingredients are completely transfered into mixed solvent phase; the extracted mixed solvent phase is concentrated and recovered, and then added with the weak polar solvent B for crystallization; the precipitate which is separated is processed by vacuum drying, so that the isoflavone product can be obtained. Compared with the prior art, the yield of the isoflavone prepared by the method is improved by 20-30%, and the cost of the production can be reduced by 20-30%.