Microbial as its name suggests, that in animal intestinal within has microbial useful live bacteria of exists, microbial fermentation feed that is in fermentation feed in the contains many useful microbial bacteria group of exists, useful microbial bacteria group in animal of intestinal within play with important of role, can promote animal of growth development, maintenance intestinal environment of health, improve animal of immunity, reduced animal medication, also can improve pig farms of farming environment,, variety function. It is safe and effective, such as pollution-free, residue-free, environmentally friendly, fermentation feeds is a new type of green feed additives. Contains a lot of probiotics in feed microbial fermentation, including lactic acid bacteria, Bacillus, yeast, bacteria, such as Clostridium butyricum.