The main role of Bacillus licheniformis is as follows: 1, treatment of intestinal infections: under normal circumstances, the beneficial bacteria and pathogenic bacteria in the intestinal tract is in a state of balance, when the intestinal tract infection, this balance is broken, resulting in pathogenic bacteria become the dominant flora, pathogenic bacteria lead to intestinal mucosa congestion, edema and damage to the intestinal mucosa, so that the number of new stools increased. Therefore, after the use of Bacillus licheniformis, enter the intestine can inhibit the growth and reproduction of intestinal pathogenic bacteria, in order to achieve a state of dynamic balance, to play a role in the treatment of intestinal infections; 2, the treatment of indigestion: food into the intestinal tract under the action of gastric acid, bile and pancreatic juice and other digestive juices become food celiac, food celiac in the intestine, the probiotic bacteria of the intestine will need to break down the food through the After entering the intestine, the probiotic bacteria of the intestine will break down the food and absorb it through the small intestine mucosa. When the immunity of the body is reduced, the balance of the intestinal flora is broken, and the pathogenic bacteria become the dominant flora, then indigestion occurs. Therefore, taking Bacillus licheniformis can increase the probiotic flora in the intestine and help digestion.