Patients with digestive malabsorption, due to diarrhea, abdominal pain, wasting, anemia and systemic malnutrition and other symptoms, therefore, dietary regimen has a very important role in improving the above symptoms and promoting patient recovery. 1.Supply sufficient heat and protein. Due to the long-term chronic disease process, the body consumes a lot, should supply sufficient caloric energy to prevent weight loss. Can supply high protein and high calorie low-fat semi-liquid diet or soft meal, protein 100 g/day or more, fat 40 g/day, total caloric energy is 10460 MJ/day (2500 kcal/day), choose food with less fat content and easy to digest, severe cases can use intravenous high nutrition or elemental diet and homogenized diet to ensure the caloric energy and the lower positive nitrogen balance. 2.Supplement sufficient vitamins. In addition to food supplementation, supplement vitamin preparations if necessary. Combine with clinical symptoms, focus on supplementing the appropriate vitamins, such as vitamin A, vitamin B complex, vitamin C, vitamin D, vitamin K, etc. 3. Pay attention to electrolyte balance. Electrolyte supplementation is extremely important in severe diarrhea, and can be supplemented intravenously in the early stage. Give fresh juice, oil-free broth, mushroom soup, etc. in the diet. Iron-deficient anemia can eat iron-rich food, such as animal liver, etc. If necessary, take oral iron supplements. 4. Small amount and many meals. Choose soft and easily digestible food to ensure adequate nutrition and not to increase the burden on the intestines. In cooking, try to make the food fine, minced, soft and rotten, to boil, braise, burn, steam and other methods are appropriate, avoid frying, deep-frying, stir-fry, etc., to reduce the amount of fat supply. Attention should be paid to the color, aroma, taste and type of food to find ways to increase the patient’s appetite. Six to seven meals per day is appropriate. 5.To ensure the supply of nutrition, patients with loss of appetite can be treated by substitution. Oral elemental meals, whole nutrition preparations, etc., to supplement nutrition.