Intestinal probiotics are a class of active microorganisms that are beneficial to the host by colonizing the human body and changing the composition of the flora of a certain part of the host. It has the following functions and efficacy: 1, can promote the absorption and digestion of nutrients, probiotics can synthesize digestive enzymes, and participate in the digestion of nutrients in the gastrointestinal tract with the digestive enzymes synthesized by the body, stimulating the body to secrete digestive enzymes, thus promoting the absorption of intestinal nutrients. 2, can improve the immunity of the body, probiotics own structure such as peptidoglycan, these components can be used as antigens directly 3, can maintain the balance of the intestinal flora structure, the intestine is not only a normal part of the body, but also involved in the important physiological functions of the body, there are complex intestinal flora in the intestine, for the human growth and development and health play a very important role. 4, intestinal probiotics can also improve the body’s antioxidant levels and inhibit inflammation in the intestine. All in all, intestinal probiotics are very useful for the human body, usually for people with low immunity, constipation and diarrhea, and patients with poor digestive function, as well as the middle-aged and elderly people with weakened intestinal function, can carry out the auxiliary treatment of intestinal probiotics.