Bacillus coagulans is a kind of Bacillus producing lactic acid. Besides the double efficacy of Lactobacillus and Bifidobacterium in the intestinal tract, it also has the high stress resistance of Bacillus. Many studies have shown that as a feed additive, it can regulate the intestinal dysfunction of animals, maintain the balance of intestinal flora, improve the immune function and production performance of the body. Therefore, this paper mainly reviews the biological functions of Bacillus coagulans and the application status of Bacillus coagulans in livestock and poultry production at home and...