1044results about How to "Improve immune function" patented technology

The invention discloses a layer feed containing a traditional Chinese medicine additive. The layer feed comprises the following components in parts by weight: 60-80 parts of corn powder, 8-10 parts of bran, 8-10 parts of bean pulp, 8-10 parts of fish meal, 8-10 parts of shell powder, and 2-12 parts of traditional Chinese medicine additive, wherein the traditional Chinese medicine additive comprises the crude drugs in parts by weight: 5-10 parts of dandelion, 3-5 parts of herba andrographitis, 3-5 parts of rhizoma atractylodis, 5-10 parts of honeysuckle, 5-10 parts of fructus cnidii, 10-15 parts of selfheal, 10-15 parts of baical skullcap root, 10-15 parts of astragalus root, 10-15 parts of Polygonum multiflorum Thunb, 5-10 parts of hawthorn, 0.5-1 part of lucid ganoderma, 10-15 parts of codonopsis pilosula, 10-15 parts of angelica sinensis, 5-10 parts of semen cuscutae, 5-8 parts of clove, 5-8 parts of pericarpium citri reticulatae, 5-8 parts of hawthorn and 5-8 parts of cinnamon. The immunoreactive substance can enhance the immune function of organism, improves the anti-stress ability and the disease resistance of the animal, improves the production performance of the animal, and simultaneously has the advantages of small toxic and side effects, no drug-resistance, no residue and the like; the survival rate of chicken is greatly improved; the lecithin content of the egg is obviously improved; the cholesterol content of the egg is reduced; and the nutritive value of the egg is improved.

Disclosed is an inorganic medicine, particularly modified montmorillonite, method for preparing the same and use thereof. The said modified montmorillonite means that dioctahedron of natural montmorillonite is not destroyed and basic chemical composition for the same is not changed, and the microstructure stacked from dioctahedron layer is changed to decrease the thickness of stacking layer and to expose and increase the end face charge and the interlayer charge of montmorillonite, thereby resulting in its lower degree of C axis order. The present medical use of montmorillonite is thus significantly strengthened, particularly the reversal treatment effect on chronic atrophic gastritis. Also disclosed are a medicine composition containing modified montmorillonite and the reversal treatment effect of natural montmorillonite on chronic atrophic gastritis.

The invention provides a high efficiency livestock and poultry nutrition replenisher and a preparation method thereof, and the nutrition replenisher contains various vitamins, amino acids and electrolyte. Simultaneously, the multi-stage premixing process is adopted by the high efficiency livestock and poultry nutrition replenisher, so that the high mixing uniformity of ultra-trace elements can beensured; and furthermore, sanguinarine is introduced into drinking water nutrition replenisher and is processed by peridium treatment, and emulsification treatment is carried out on liposoluble vitamins, so that good water-solubility can be guaranteed. The high efficiency livestock and poultry nutrition replenisher has comprehensive nutrition, leads all nutrient components to be supplemented witheach other, can effectively prevent deficiency of the vitamins and the amino acids, maintains electrolyte balance, regulates the metabolism of organism, improves the feed conversion rate and the anti-stress capability, stimulates the immune function, reduces the occurrence of diseases, and has remarkable economic and social benefits as well as broad market prospect.

The invention discloses a mycotoxin detoxification agent for feed and a preparation method and a feed additive thereof, and belongs to the field of feed additives. The mycotoxin detoxification agent can be used for detoxification of feed raw materials and compound feed of mycotoxin polluted corn, grains and the like. The mycotoxin detoxification agent consists of modified montmorillonite, yeast cell wall, chitosan and the like; and the preparation method has simple process. The novel mycotoxin detoxification agent for feed can effectively remove pollution of multiple mycotoxins such as aflatoxin, zearalenone, T2 toxin, vomitoxin and the like in the feed raw materials and the feed of the corn, the grains and the like, and prevent various diseases of livestock and poultry because of eating the mycotoxin polluted feed. The mycotoxin detoxification agent has simple preparation process, stable and controllable quality, convenience in use and low price, meanwhile has the advantages of supplementing nutrients, improving the disease resistance of cultured animal bodies and avoiding adsorbing nutrient elements in the feed, and guarantees the health and safety of the cultured animals.

The invention discloses a carboxymethyl pachyman (CMP) with high-degree of substitution and making method and application, which is characterized by the following: adopting water or water alcohol solution as dielectric; proceeding substitution reaction for pachyman, chloroacetic acid and fitful excessive sodium hydroxide to obtain CMP without vibrating technique and equipment; improving CMP D / S and solubility to reach injection need.

The invention discloses fish soluble feed protein and a processing method thereof. The processing method comprises the following steps of: mixing fish soluble and bean pulp, adding a strain into the mixture for solid-state fermentation, directly mixing the obtained product without drying and other raw materials in a formula and taking the mixed products as a feed for pigs, birds and cattle, or drying and crushing the obtained product to prepare the fish soluble feed protein used for protein raw materials in the feed industry and breeding industry after the fermentation is finished. The method has the advantages of simple process, low equipment investment and low cost; and the fish soluble feed protein is strong in fragrance and good in food attraction, improves protein content, is high in small peptide content and easy to digest and absorb, eliminates anti-nutritional factor in the bean pulp, is rich in various beneficial functional nutrient components such as probiotic and the like, plays active roles in improving weight gain and feed conversion rate, strengthening the immune function of organisms, improving production performance and the like, can greatly replace fish meal in livestock and poultry feeds and aquatic feeds, remarkably reduce feed cost, turn the fish soluble into the value from the waste, and is favorable for environmental protection as well as energy conservation and synergism.

The enzymically hydrolysis process of preparing fucan sulfate with brown algae includes the following steps: compounding composite cellulase with cellulase and pectase; enzymolyzing brown algae material via adding the composite water and cellulase at pH 6.0-8.0 for 50-80 min; heating at 90-100 deg.c in water bath for 3-4 hr, cooling to room temperature and centrifuging to obtain supernatant; adding alcohol to the supernatant to produce precipitate and centrifuging to obtain the second supernatant; adding alcohol to the second supernatant to produce precipitate and collecting the precipitate; washing the precipitate and vacuum freeze drying to obtain white powder. The said process has high extraction rate, low product cost, and less environmental pollution.

The invention provides a pig feed for improving growth performance and immunization function of weanling pig, which is characterized by comprising a feed carrier, nicotinic acid, calcium pantothenate, biotin, vitamin C, Lactobacillus lactis, lactobacillus plantarum, amylase, protease, fish oil, zein powder, grease, methionine, tryptophan, threonine, lysine, ethoxy quinoline and a traditional Chinese medicine additive. The traditional Chinese medicine composition is added to the feed to improve the growth performance and immunization function of the weanling pig, thereby promoting the healthy growth of the baby pig.

The invention discloses a special compound feed for crabs. The compound feed consists of soybean meal, rapeseed meal, peanut meal, corn protein powder, spray-dried animal blood cells, fish meal, shrimp meal, four, fish dissolving-pulp protein powder, yeast extract, fish oil, soybean lecithin oil, bentonite, monocalcium phosphate, a mildew preventive, mannan oligosaccharide, glycine betaine, a hulling element, methionine, choline, perilla seed extract, a vitamin premix and a mineral premix. The raw materials of the compound feed are stable in source, high in utilization ratio, balanced in nutrient content and relatively low in cost. The preferred fish dissolving-pulp protein powder enhances the feed attraction of the feed. An advanced puffing process is adopted so as to further improve the utilization ratio and water resistance of the feed and reduce waste and water pollution. Meanwhile, an immune nutrition additive is adopted so as to significantly enhance the immune function and anti-stress capacity of the crabs and significantly increase the survival rate. The compound feed is much greener and more environmentally friendly, and efficiency increase is particularly significant in a high-density river crab breeding mode.

The present invention relates to the field of feed formula design, specifically to a novel green broiler chickens complete feed and technique of preparing the same. A safe, pollution-free novel green broiler chickens complete feed of the invention is composed of the following components by weight parts: 55 -60 parts of corn, 10 -20 parts of dehulled bean pulp, 2 -3 parts of corn protein powder, 2 -3 parts of corn alcohol dreg, 2 -5 parts of cottonseed meal, 2 -8 parts of Chinese herbal compound preparation, 0.3-0.4 parts of multi-vitamin, 0.2 parts of composite trace elements. Thebroiler chickens complete feed develops a novel pollution-free non-drug residue green broiler chickens complete feed by adding Chinese herbal compound preparation. The broiler chickens fed by the feed greatly enhances immune function, greatly enhances the immunity against the disease and substantially improves the survival rate.

This invention relates to a micro-ecological agent and the preparation method thereof, belonging to the micro-ecological agent technological field. The preparation of the active bacteria agent of this invention comprises: using L-calcii lactas and four useful micro-organisms of clostridium bytyricum, Lactobacillus casei, bacillus subtilis and saccharomycete as characteristic elements, cultured purely or mixedly by means of universal fermentator, producing active bacteria powder by freeze-drying, and acquiring the finished products by double crossing of the powder at a specific proportion. By using the anaerobic and aerobic characteristics of related bacterial strains, this agent has the following merits: playing the synergy effect in enhancing the disease resistance of marine animals and the water purification of aquaculture, substituting antibiotics fully or partly for the disease prevention and cure in fresh water aquiculture and mariculture, and improving the economic benefits of aquaculture. The L-calcii lactase component can accelerate the husking growth and prevent the disease of soft husk of shellfish marine animals like shrimp and crab. This agent is characterized of being nontoxic, free from side effects, nonpersistent, without secondary pollution and no drug tolerance, and will have a wide commercial application in the fresh water aquiculture mariculture.

The invention provides a toxin adsorption antidote capable of eliminating harm done by mycotoxins to livestock. The toxin adsorption antidote is prepared from 45-55% of modified attapulgite, 20-28% of modified montmorillonite, 5-10% of lignocelluloses, 5-15% of yeast cell walls, 1-2% of multi-vitamin micro-mineralization nutritious supplementary and 3-5% of functional extract superpacket. The toxin adsorption antidote can adsorb common mycotoxins, including aflatoxin, zearalenone, vomitoxin, ochratoxin and fumonisins, in feed so as to reduce the harm done by mycotoxins to animals; meanwhile, adsorption detoxication function is realized through nutrition enhancement and immunity improvement of livestock, and livestock breeding effect is improved.

The invention discloses a bio-organic fertilizer with straw powder as a main material. The bio-organic fertilizer is composed of, by weight, 50-60 parts of the straw powder, 15-20 parts of rapeseed meal, 6-8 parts of alfalfa meal, 4-5 parts of common achyranthes herb powder, 2-4 parts of garden soil, 5-6 parts of flour, 8-10 parts of vinegar residues, 6-10 parts of soy sauce residues, 4-6 parts of shell powder, bran 10-20 parts of unite bran, 3-4 parts of salvia prionitis powder, 5-7 parts of river mud, 50-60 parts of swill, 8-10 parts of brown sugar and 60-80 parts of faeces of human and animals. The bio-organic fertilizer produced by the method has high organic matter content, and can improve soil quality and soil structure, thereby keeping ecological balance. Besides, the bio-organic fertilizer is comprehensive in nutrition and contains macroelements and microelements required by crops and a large amount of active substances produced during a microbial fermentation process.

The invention discloses a '+3-1' livestock and poultry breeding mode. Livestock and poultry are bred in a large scale in the breeding mode that lactic acid bacteria fermentation liquor and microbial fermented feed are fed, biological disinfectant is sprayed, and antibiotics are not added. A breeding method includes the following steps that a farm is disinfected by the biological disinfectant; 5-250ml of the lactic acid bacteria fermentation liquor is fed per day; the microbial fermented feed or mixed feed is fed per day, wherein the mixed feed is prepared from the microbial fermented feed and complete feed, and the weight of the microbial fermented feed accounts for 0-30% of the total weight of the mixed feed. The livestock and poultry are pigs or chicken, the pigs comprise sows, piglets, nursery pigs and lard pigs, and the chicken comprise broiler chicken and laying hens. The livestock and poultry are bred in the '+3-1' breeding mode, economic benefits, ecological benefits and social benefits are remarkable, and the '+3-1' livestock and poultry breeding mode can be popularized and applied.

The invention provides grass carp feed and a making method thereof, and relates to the field of fish feed. The grass carp feed comprises, by weight, duckweed, folium isatidis, rice bran, wheat bran, corn flour, bean pulp, vinasse, fish meal, feed yeast, Chinese herbal medicine additives, methionine chelated copper, lysine chelated zinc, arginine chelated magnesium, leucine chelated iron, tryptophan chelate, vitamin E, monocalcium phosphate and water. The grass carp feed is reasonable in matching, the protein content is 30-35%, the carbohydrate content is 38-60%, and the grass carp feed also contains rich vitamins, amino acid and the like, so that the nutritional requirements of crucian carps in the growing period are met, growth of fishes is effectively promoted, the growing speed of crucian carps is increased, the body form becomes much better, meat quality is obviously improved, and high disease resistance and safety are achieved.

The invention discloses a plant microecological preparation for enhancing the immunity of an animal and a preparation method of the plant microecological preparation, and belongs to the field of feed additives. The plant microecological preparation is prepared by the following steps: mixing crushed materials or extracted materials of radix pseudostellariae, liquorice, rhizoma atractylodis macrocephalae, honeysuckle, astragalus membranaceus, eucommia ulmoides, great burdock achene, dandelion and herba epimedii, adding a culture solution to prepare a culture medium, adding a total bacterium liquid consisting of two or more than two of lactobacillus plantarum, enterococcus faecalis, enterococcus faecium, enterococcus faecium, pediococcus acidilactici, pediococcus pentosaceus, rhodopseudomonas palustris, bacillus subtilis and lactobacillus fermenti, fermenting and drying. The plant microecological preparation disclosed by the invention has the advantages that the immunity of the animal can be obviously improved, the production performance can be improved and the diarrhea rate can be reduced.

The present invention belongs to the field of microbial technology, relates to a liquid-solid combined fermentation process of probiotics using bifidobacterium as main raw material, mainly includes the following steps: making bifidobacterium, acidophilic lactobacillus and thermophilic streptococcus respectively undergo the two stages of stock 1-3 order liquid culture and solid culture, the weightratio of three bacteria powders in the preparation is 50-80:10-15:5-16. Said solid culture includes the following procedures: firstly, sterilizing, inoculating 20-30% of tertiary culture, placing them into plastic bag, vacuum-pumping, injection anaerobic sterile N2 into said non-toxic sterile plastic bag, and adding bifiobacterium into solid culture medium, and promoting live bacterium multiplication to 10 to the power 8-10 to the power 9 order, and can prolong its storage time.

The invention discloses a block for the nutrient balance and health of special livestock yaks under the low-oxygen condition of the Tibet plateau, which consists of the components of molasses, urea, salt, corn flour, calcium hydrogen phosphate, bentonite, oligosaccharide, zinc sulfate, ferrous sulphate, potassium iodide, sodium selenite and cobalt chloride. The block provides mineral elements andcrude proteins of which the yaks are lack due to unbalanced ingestion, improves the constitution of the yaks, enhances disease resistance, reduces the using amount of antibiotics, and also can increase the hemoglobin content of the blood of the yaks to further improve the adaptability of the yaks to a low-oxygen environment.

The invention provides a plant-based animal immune potentiator prepared by fermenting and developing radix astragali decoction dregs, which belongs to the field of biotechnology. The immune potentiator is prepared by mixing 55 mass percent of radix astragali decoction dregs serving as a raw material with 30 mass percent of corn flour, 10 mass percent of bran and 5 mass percent of carbamide to prepare a decoction dreg fungal solid culture medium, wherein the material to water volume ratio of a fermentation system is 1:2; adjusting the pH to 5.0, inoculating Cordycepscicadae serving as a fermentation strain, wherein the temperature is kept between 25 and 30 DEG C in a fermentation process and the fermentation lasts for 240 hours. The fermented product can be directly or indirectly added into a feed for poultry or pigs to be used as the animal immune potentiator. The immune potentiator has the advantages that: raw materials are widely available; the production cost is low; the immune enhancement effect is desirable; environmental pollution is avoided in a production process; waste materials are converted into things of value; the fermented product is safe to people and animals; and the effect is remarkable. The immune potentiator is a non-polluted immune potentiator.

The invention relates to a clinical nutrient formula special for tumor and a preparation method of the clinical nutrient formula. The clinical nutrient formula is prepared from the following raw materials: proteins, fat, a carbohydrate, dietary fibers, macroelements, trace elements, fat-soluble vitamins, water-soluble vitamins, a medicinal and edible component, a natural plant compound and new resource food, wherein the medicinal and edible component is selected from at least one of hawthorns, sea-buckthorn, poria cocos, sealwort, chrysanthemum, dandelion, lilies and fermented soybean; all the components are prepared into powder; the fat is prepared into powdered oil by adopting a micro capsule embedding technology. Due to screening and proportioning of the components, the nutrient formula disclosed by the invention can supply comprehensive nutrition support to a tumor patient and substantially increase the biological value of the proteins; moreover, due to the adding of the components capable of enhancing the immunity and resisting the tumor, the physique of the tumor patient can be enhanced, and malnutrition which possibly occurs or exists can be prevented or corrected; the nutrition supporting effect is enhanced, so that the patient can bear a complete chemotherapy process.

The invention discloses a mycotoxin toxin adsorbent of a livestock and poultry feed and a preparation process. The mycotoxin toxin adsorbent is prepared from modified montmorillonite, yeast extract, lactobacillus acidophilus, lactobacillus amylovorus, sialic acid lactobacillus, streptococcus thermophilus, bacillus subtilis, honeysuckle extract, camellia oil extract, glycyrrhizic acid, echinacea extract, eugenol, cinnamic aldehyde, baicalin, vitamin C, vitamin E and zinc methionine. The mycotoxin toxin adsorbent provided by the invention can realize efficient adsorption on a plurality of types of common mycotoxin and the conversion rate of the feed is improved; meanwhile, the balance of intestinal flora of livestock and poultry can be promoted, and the added zinc methionine in the formula also has the effect of protecting livers; and the selected raw materials are natural and pollution-free and have a very good application value in feed and cultivation industries.

The invention belongs to the technical field of feed, and particularly relates to compound feed for improving the production performance of laying hen and the egg quality. The compound feed consists of corn, lard oil, soybean meal, rape seed cake, peanut meal, gunite bran, mountain flour, calcium hydrophosphate, lysine, methionine, liquid phytase, liquid xylanase and premix. The compound feed provided by the invention can obviously improve the production performance of laying hen and improve the laying rate and the egg quality, and can increase the weight of a single egg and reduce the damage rate of eggs; and moreover, after being eaten by the laying hen, the compound feed can promote digestive absorption, improve the feed conversion rate and the feed-gain ratio, and increase the economic benefits of laying hen farming.

The invention discloses an anti-oxidant composition for improving animal immune function and a preparation method thereof, belonging to the field of feed additive. The composition comprises the following ingredients: 2.0-18.0 wt% of vitamin E, 5.0-30.0 wt% of vitamin C, 2.0-40.0 wt% of thioctic acid, 1.0-25.0 wt% of antioxidants, and the balance consisting of corncob powder, wherein, the antioxidants are mixtures of one or more of daidzein, astragalus polysaccharides and tea polyphenol. According to basic theory of free radical biology, various antioxidants are used to form an antioxidant network, because of the synergism among the antioxidants, the oxidation resistance of the animal that takes the composition is enhanced greatly, so that the immune tissue and organs of the organism are protected, and the animal immune function is improved.

The invention discloses feed additive which improves the immunity of seawater fish. The feed additive consists of three or more than three types in clostridium butyricum, mannan oligosaccharide, xylo-oligosaccharide and fructooligosaccharide by proportion. 0.1 percent to 1 percent of seawater fish immunity intensifier of the invention is added into seawater fish feed, which can obviously improve the level of the muramidase in serum and skin mucus, obviously improve the level of IgM in the serum and the skin mucus, improve the fish immunity response capability, thereby improving the disease resistance of the cultivated fish. 1 percent of the immunity intensifier of the invention is added into the seawater fish feed, which can obviously improve the daily weight gain of the fish and reduce the food coefficient. The feed additive which improves the immunity of the seawater cultivating fish of the invention can obviously improve the immunity response level of the seawater cultivating fish, improve the disease resistance, and is safe without public harm and residue; the seawater fish cultivated by the additive meet the green food sanitation requirements.

The invention belongs to the technical field of affinal-drug-and-diet formulas and new-resource foods, and particularly provides a medical formula food for patients in inflammatory bowel disease. The formula is designed according to the requirement in "National Food Safety Standard General Rules on Formula Food for Special Medical Use". With consideration of the body characters of patients in the inflammatory bowel disease, various "affinal-drug-and-diet" traditional Chinese medicines are combined reasonably according to traditional Chinese medicine essential principles, and a plurality of affinal-drug-and-diet traditional Chinese medicine extract essences which are extracted through a pre-hydrolysis SBE technology, various micro-capsulated probiotics, oligopeptides extracted through bio-enzymolysis, prebiotics, amino acids, carbohydrates, grease having health-caring functions, various vitamins and minerals are all mixed together and are subjected to other processes to obtain the medical formula food. The medical formula food can be used for satisfying nutrition requirement of the patients in the inflammatory bowel disease as a single nutritional source, and also has the effects of moving qi and promoting digestion, fortifying spleen and promoting appetite, quieting spirit and improving intelligence, treating food accumulation and poor digestion, distention and pain in gastral cavity and abdomen, deficiency in spleen and poor appetite, and enhancing body immunity.

The invention discloses crab fodder with added enteromorpha prolifera and a Chinese herbal medicine immunopotentiator. The fodder product comprises raw materials of 15-20 parts of bran, 20-30 parts of smashed straw, 10-15 parts of wheat shorts, 8-12 parts of enteromorpha prolifera powder, 8-10 parts of bean pulp, 8-10 parts of cottonseed meal, 12-18 parts of high protein flour, 4-6 parts of dried blood, 3-5 parts of sea fish oil, 4-6 parts of animal fat, 1-3 parts of inkfish paste, 0.5-1 part of Chinese herbal medicine mixture, 0.5-1.5 parts of choline chloride, 0.3 part of salt, 0.2 part of glycine betaine, 0.2 part of inositol, 0.5 part of multi-vitamin, 1 part of composite microelement and 0.5 part of allicin. The product has the advantages that crabs are promoted to grow quickly obviously, the cultivation breeding rate is improved, cultivation cost is lowered, the breeding digestibility is improved, nitrogen and phosphorus excretion is lowered, and breeding environment is improved, and high cost performance and promotion application value are achieved.

A Chinese medicine for preventing and treating the bacterial and viral diseases of aquatic animals is prepared from 12 Chinese-medicinal materials including astragalus root, Chuan-xiong rhizome, tangerine peel, rhubarb, etc.

The invention relates to the field of feed additives, in particular to a functional dairy cattle feed additive capable of preventing subclinical mastitis of dairy cattle. According to the functional dairy cattle feed additive, based on the total weight of the additive, the functional dairy cattle feed additive contains 2%-6% of organic selenium, 2%-6% of organic zinc, 4-8% of biological antioxidant, 8%-12% of mold adsorbent, 0.2%-0.6% of vitamins, 8%-12% of conventional additive for reducing the number of somatic cells, and 50%-80% of carrier. The invention provides the functional dairy cattle feed additive capable of preventing the subclinical mastitis of the dairy cattle and reducing the number of the somatic cells, the formula is reasonable, the nutrition is balanced, the number of thesomatic cells in the dairy cattle can be effectively reduced, the incidence of the subclinical mastitis of the dairy cattle can be reduced, the good development mechanism of a mammary system can be maintained, and the milk yield and the milk quality of the dairy cattle can be improved.

The invention relates to the field of feed additives, in particular to a Chinese herbal medicament immunopotentiator for high-density breeding of grass carp and a preparation method thereof. The Chinese herbal medicament immunopotentiator consists of the following raw materials in parts by weight: 80 to 120 parts of manyprickle acantopanax root, 50 to 100 parts of eucommia bark, 100 to 120 parts of rhubarb, 50 to 100 parts of astragalus mongholicus, 80 to 100 parts of scutellaria laterifolia, 100 to 150 parts of indigowoad leaf, 50 to 80 parts of sophora alopecuroids and 50 to 80 parts of pilose asiabell root. Aiming at the problem of weakened immunity of the grass carp in intensive and large-scale production of a grass carp breeding industry, the Chinese herbal medicament immunopotentiator serves as a feed additive and is applied to a grass carp high-density breeding feed to ensure that the immune function and the survival rate of the grass carp are improved. The Chinese herbal medicament immunopotentiator is safe and reliable for long-term use, does not have toxic or side effect and is low in cost; by the adoption of the Chinese herbal medicament immunopotentiator, the grass carp can grow quickly, the feed conversion ratio is high, and the economic benefits are greatly improved.

The invention discloses a preparation method and an application of a ginkgo leaf extract, wherein the method comprises the following steps of: a) washing and then drying ginkgo leaves; b) crashing and sieving; c) soaking by ethanol; d) oscillating by a ultrasonic cell crasher; e) extracting and filtering; and f) condensing in vacuum and drying. The invention has the advantages of adopting an ultrasonic-assisted extraction method, utilizing the functions of strong vibration, extremely high acceleration, strong cultivation effect, even stirring and the like generated by ultrasonic waves, accelerating the entry of the medicament effective constituents into the solvent, simultaneously avoiding the effect of high temperature on extraction constituents and greatly improving the yield of the extract. In the extract, flavonoids accounts for 36 percent, ginkgo terpene lactones account for over 8 percent while the injurant phenolic acid is less than 3PPM, therefore, the product has high safety. The obtained Ginkgo leaf extract of 4 to 6g is added to each kilogram of feeding stuff, therefore, the animal immune anti-inflammatory action and the production property can be raised by more than 10 percent and 2 to 3 percent respectively.