The characteristics of bio-composite pre-mixed feeds (biological feed converting agents) are: (1) The nutritional factors such as enzyme preparations, beneficial live bacteria, activators, and protective agents are processed by advanced technology and can rapidly convert straw, etc. into biological feed. Domestic and foreign first. (2) Short processing time, 1 to 3 days in spring, summer and autumn, and 3 to 7 days in winter. (3) Not subject to seasonal restrictions and can be used throughout the year. (4) Complete nutrition and palatable Good sex, easy to digest and absorb. (5) Reduce fecal odor, improve hygiene conditions of livestock and poultry, and control environmental pollution. (6) Improve immune function and enhance disease resistance. Compared with conventional pre-mixed feeds, conventional pre-mixed feeds often affect the meat quality of livestock and poultry, which in turn reduces the relevant indicators. The method for converting straw into biological feed is as follows. 1. The choice of straw. Different animal biological feed can choose different types of straw. Herbivorous animals (such as cattle, sheep, horses, donkeys, etc.) can use corn stover, rice straw, wheat straw and other low-nutrition, high-fiber and wood Stalks; monogastric animals, poultry, and fish (eg, pigs, rabbits, ducks, geese, fish, etc.) may choose materials with relatively high nutrients, relatively low crude fiber and lignin, such as peanut pods, peanut hulls, Rice bran and wheat bran are used as raw materials. No matter which kind of straw, roots and soil should be removed first to remove the rotten and metamorphic parts and try to keep the straw fresh and fresh. Straw preservation method: During the autumn harvest, dry the straw, classify it and make it into a mortar. Cover it with plastic cloth or other rain-proof equipment to prevent leakage, rain and snow, and store it for a long time. 2. Production method of cattle and sheep biological feed (1) Cattle feed. The straw is cut into short sections of 3 to 5 cm with a rake, or rubbed into a filament with a rubbing machine and weighed 75 kg on a clean concrete floor. Above, take 0.5kg of transforming agent and add it to 75kg of clean water (preferably use 30°C water in winter) to fully dissolve. Spray the aqueous solution of transformant into prepared straw that has been cut or rubbed, and stir into plastic after mixing. Bags or other containers are packed with edges, and finally the mouth is fastened or sealed with a plastic cloth and placed in a cool place. After anaerobic fermentation for 1 to 3 days (3 to 7 days in winter), it becomes nutritious and easy to produce. Digested and absorbed straw biological feed, feed yellow, with a strong aroma of wine and malic acid. Avoid exposure to the sun under the sun, because the sun's ultraviolet light has a bactericidal effect, affect the role of beneficial bacteria and enzymes. (2) Livestock feed for sheep. The straw is crushed to a coarse powder of 4 to 6 mm or made into fluffy small pieces using a kneading machine, and can be processed according to the above-mentioned method for producing a bovine feed. 3. Pig and duck biological feed production methods. It is best to use peanut pods, soybean meal, rice bran, corn stalks, peanut shells, etc. as raw materials, crushed into 30 to 40 mesh fine powder, production methods and cattle and sheep biological feed production The same method. 4. The role of rabbits, fish, biological feed method. The main granulation, no granulation conditions, rabbit bio-feed powder can also be.