The function of small intestine is mainly to absorb and digest food, which can be regulated by diet, exercise and medicine. 1. Diet: Eat regularly, at regular intervals, eat light and easy-to-digest food, such as rice porridge, avoid cold and spicy food such as ice-cream and chili peppers, and avoid overeating. 2. Exercise: Reasonable exercise can promote intestinal peristalsis, which is conducive to the digestion and absorption of food in the small intestine. 3. Medications: Certain probiotics, such as Bacillus licheniformis and Bifidobacterium bifidum, can be taken to promote the digestion and absorption of food. It is recommended to use them appropriately under the guidance of a physician or pharmacist, and avoid using them on your own. There may be other conditioning methods for poor small bowel function such as massage and hot compresses. If poor small intestinal function, obvious diarrhea, abdominal pain and other symptoms, you should go to the hospital as soon as possible, under the guidance of the doctor standardized treatment.