Intestinal probiotics are a class of active microorganisms beneficial to the intestinal tract. Under normal circumstances, probiotics in the intestinal tract fight against and resist the pathogenic bacteria that invade the intestinal tract and restrain each other. Thus, human health is achieved and the intestinal micro-ecological balance is improved. When this balance is out of balance, it can lead to the occurrence of intestinal diseases. Intestinal probiotics belong to one of the intestinal flora, which is divided into beneficial bacteria, neutral bacteria and harmful bacteria. Intestinal probiotics exist in the intestinal tract of healthy people and can break down proteins, carbohydrates, dissolve vitamins, synthesize vitamins needed by the body, help the body digest food and maintain the health and immune function of the body. Therefore, probiotics are also commonly used clinically to treat diseases of the digestive system, such as indigestion, diarrhea, constipation and other diseases, and intestinal probiotics are very beneficial to the human body.