Method for preparing feed protein by mixed fermentation of tilapia leftovers and soybean meals

The invention relates to a method for preparing feed protein by mixed fermentation of tilapia leftovers and soybean meals, belonging to the field of feed additive preparation. The method comprises the following steps: mincing fresh tilapia leftovers, mixing the minced tilapia leftovers and crushed soybean meals at 60 meshes, adding water and uniformly mixing, and adding bacteria and enzyme to carry out solid fermentation; and drying and crushing the fermented raw materials to obtain the fermented feed protein. The fermented feed protein powder prepared by the invention is rich in small peptides and probiotics. According to the invention, the protein utilization rate is raised, the growth effect of animal is raised, the survival rate is raised. The fermented feed protein can completely replace fish meal in the feed industry, thus the feed cost is obviously reduced.