Lactobacillus acidophilus mainly exists in the intestines of enddotherms and in the oral cavity of human beings. The survival rate of Lactobacillus acidophilus in the stomach can reach 80%. Therefore, it can pass the test of gastric acid and choline, which helps to increase the probiotics in the intestinal tract. Lactobacillus Acidophilus belongs to gram-positive bacteria with round ends. It can release lactic acid, acetic acid and other antibiotics inhibiting harmful bacteria. It can regulate intestinal bacteria balance and inhibit the proliferation of intestinal undesirable microorganisms.