Food does not have the role of repairing intestinal mucosa, mainly intestinal mucosa itself to update and repair, minor damage need to cooperate with the adjustment of diet, serious damage need to receive treatment. 1. Slight damage: patients can eat more easily digestible and nutritious food, such as cabbage, pumpkin, millet and so on. Avoid hard, cold, spicy and stimulating foods to minimize the damage to the intestinal mucosa and promote self-recovery. 2. Serious damage: If the patient’s intestinal mucosal damage is more serious, the cause needs to be identified, and the common ones are infectious enteropathy, ischemic enteropathy, ulcerative colitis, Crohn’s disease and so on. It is necessary to choose treatment measures according to the cause, based on the treatment of the primary disease, symptomatic drugs can be orally colloidal bismuth pectin to protect the gastrointestinal mucosa, but also can be used to inhibit the secretion of gastric acid with omeprazole, pantoprazole, etc., to protect the intestinal mucosa. After the intestinal mucosa is damaged, due to the fast renewal of intestinal epithelial cells, it can be recovered in about 15 days, but the specific recovery time is mainly related to the degree of intestinal mucosal damage and the damaged area, which varies from person to person. Medication should follow the doctor’s advice, not self-medication.