In the treatment of small intestine dysfunction, clinically used drugs are mainly as follows: 1. drugs to regulate intestinal flora disorders: commonly used are Bifidobacterium, Bacillus subtilis, Saccharomyces boulardii, Bacillus licheniformis, etc.; 2. drugs to regulate gastrointestinal dynamics: commonly used are trimethoprim, pivirimide, etc. Small intestinal dysfunction is often clinically manifested as abdominal pain, bloating, diarrhea, belching, etc. According to the above clinical manifestations, different drugs can be clinically selected for treatment. For patients with small intestine dysfunction, special emphasis should be placed on diet structure, avoiding spicy foods and eating light, easily digestible foods. In addition to medication, special attention should be paid to lifestyle and diet modification. It is also important to have a clear diagnosis of small intestine dysfunction in the hospital to avoid unnecessary complications or serious organic lesions due to missed diagnosis, misdiagnosis or self-medication.