Compound microbial fermentation feed and preparation method thereof

The invention discloses a compound microbial fermentation feed and a preparation method thereof. The preparation method comprises the following steps: step 1, crushing and mixing straw powder, fish meal, corn flour and rapeseed meal; 2, bacillus subtilis, clostridium butyricum, aspergillus niger and saccharomyces cerevisiae are inoculated into a culture medium to be activated; step 3, putting the raw materials crushed and mixed in the step 1 and the bacterial liquid obtained in the step 2 into a fermentation tank for fermentation; wherein the fermentation tank in the step 3 comprises a tank body, and a feed hopper is fixed at the edge of the top of the tank body in a penetrating manner; and the mounting ring is arranged outside the mounting column in a sleeving manner. According to the compound microbial fermented feed and the preparation method thereof, during fermentation operation, the raw materials are mixed by adding a bacterial liquid in a layered manner, so that the mixing uniformity is improved, the r