Method for improving soy isoflavone conversion rate of composite probiotics fermented soybean meal feed

The invention provides a method for improving soy isoflavone conversion rate of a composite probiotics fermented soybean meal feed. The method comprises the following steps: uniformly stirring crushed soybean meal, water and composite probiotics, sealing up and fermenting so as to obtain the feed. The method adopts a microorganism solid fermentation process, the used raw materials do not need to be sterilized, the fermentation process is simple, the production cost is low, and the soy isoflavone aglycone activity is high. The fermented soybean meal feed provided by the invention is thick in fragrance, capable of greatly improve the feed intake of animals, golden yellow and floppy in texture, and the activity of the soy isoflavone after fermentation is greatly improved. By adopting the process method, the recycling rate of dry substances is high.