Microbial fermentation wet material for promoting growth of aquatic animals as well as preparation method and application thereof

The invention provides a preparation method of a microbial fermentation wet material for promoting the growth of aquatic animals, which comprises the following main fermentation steps: mixing fermentation raw materials with fermentation microorganisms, and carrying out solid state fermentation at 30 DEG C for 72 hours, wherein the mass of the fermentation microorganisms accounts for 0.3-0.5% of the mass of the fermentation raw materials. According to the method provided by the invention, the content of viable bacteria in the fermented feed reaches 10 billion/g, the water content is kept at 35-42%, and the proportion of infectious microbes is less than or equal to 0.4%. The fermented feed has the effects of regulating intestinal flora balance of aquatic animals, providing nutrition for organisms, inhibiting growth of pathogenic bacteria, stimulating immune response of the organisms, enhancing anti-stress capability of the organisms, regulating water quality, reducing pollution, reducingharmful substances and t