Diet after gastrectomy requires attention: give liquid diet in the early stage, after the recovery of gastrointestinal function gradually transition to normal diet, small amount of meals, mainly dry food, less soup. The general principle of postoperative diet is high fat, high protein, high vitamin, low sugar, 1 day after the operation, no drinking and fasting, patients receive intravenous nutrition. On the 2nd postoperative day, intravenous nutrition, insufficient energy through the mouth a small amount of fluid supplementation, a small number of meals, when the performance of oral water or food is poor, in accordance with the doctor’s orders should be given in addition to intravenous rehydration. About 5 days after surgery, the patient’s diet can be transitioned to semi-liquid, in the case of gastrointestinal can tolerate, high-fat, high-protein, high-vitamin, low-carbohydrate diet, especially during chemotherapy, chemotherapy 2 hours before eating, in order to prevent the occurrence of postoperative dumping syndrome, it is recommended that after discharge from the hospital to eat more dry food and less soup, and to limit the amount of sweet food intake. Postoperative recipes are formulated using a scale and the patient’s serum protein level to assess the patient’s nutritional status, based on the dietitian’s advice and the patient’s daily dietary habits, based on the food exchange method to formulate recipes, and visit the nutrition clinic every 2 weeks to adjust the recipes based on weight, serum protein and other indicators. Food temperature should be appropriate, chewing and swallowing slowly, not overeating, not eating greasy, spicy and stimulating food.