The stomach is one of the important digestive organs of the human body, with the functions of accepting food, storing food and secreting gastric juice, etc. The stomach also further grinds the food processed by the mouth and mixes it with gastric juice, and after further processing and digestion of the food into chyme, then systematically sends the chyme into the intestine for digestion and absorption. The gastric cardia has the function of preventing the regurgitation of gastric contents into the esophagus, and the rhythmic opening and closing of the pylorus prevents gastric contents from entering the small intestine too quickly. Patients after total gastrectomy often have symptoms of dumping syndrome such as heartburn, acid reflux, intestinal tinnitus and even palpitations, panic, and cold sweats, which are related to the loss of these structures and functions. Despite various kinds of digestive tract reconstruction after total gastrectomy, it is still difficult to completely avoid these complications, and postoperative dietary habits should be changed accordingly. The diet after total gastrectomy should pay attention to the following issues: 1, keep a relaxed mood, moderate activity, avoid strain and cold. 2, chew slowly, avoid raw, cold, hard, spicy wine and other stimulating diet, the early postoperative period should be mainly liquid, semi-liquid, to ensure adequate nutrition, high protein, high vitamin and vitamin A, B, C content of adequate food, vegetables and fruits in moderation, do not eat too sweet food. 3.Eat less and more meals, 5~6 meals per day after discharge, about 50 grams per meal, gradually increase to 6~8 months to resume 3 meals per day, about 100 grams per meal, 1 year later close to normal diet. 4.If there is anemia, in addition to tumor recurrence and chemotherapy factors, follow the medical advice to supplement vitamin B and folic acid.