Gastric cancer ranks first among all kinds of malignant tumors in China, and there are obvious geographical differences in the incidence of gastric cancer. The prognosis of gastric cancer is related to the pathological stage, location, tissue type, biological behavior and treatment measures of gastric cancer. 1. After surgery, patients with gastric cancer cannot eat and drink like normal people, and it takes at least six months to return to normal. Therefore, postoperative patients should be discharged from the hospital and eating less and more meals is the principle of diet. Meals should be eaten 5-8 times a day with 75-100 grams of food intake each time. Initially, the amount is small and the number is large, and then gradually to the amount is large and the number is small. From liquid, semi-liquid to soft food. 2. In terms of diet, gastric cancer patients should chew and swallow slowly, not to bite and swallow, but to let food chew with teeth in the mouth and mix food and saliva with tongue, so that it is easy to digest and replace part of the digestive function of stomach with mouth, which reduces the burden of stomach. 3.For post-operative gastric cancer patients, daily diet has great requirements. Usually, the diet should be light, high vitamin, high protein, rich in nutrition and easy to digest. Such as noodles, various kinds of porridge, milk, soy milk, lotus root powder, fish, shrimp, lean ground meat, etc. Eat more fresh fruits and vegetables frequently. The main reason is that after gastric resection, the absorption of iron is affected by the reduction or lack of gastric acid, which leads to iron deficiency anemia. Ferrous sulfate, animal liver, spinach, etc. can be taken. 5.Patients with gastric cancer must strictly consume fried, spicy and stimulating foods such as coffee, strong tea and too cold drinks in their diet, whether in post-operative or daily life, and overheated and too sweet foods should also be restricted. The temperature of food should preferably be 40~50. prohibit smoking and alcohol. 6. In the 2-3 weeks of postoperative recovery period, some patients who have recovered well may experience panic, sweating, dizziness, nausea, vomiting and upper abdominal discomfort after eating sweet food (such as milk with sugar), which usually lasts for 15-30 minutes and can be relieved by themselves, which is called “dumping syndrome”. To prevent this situation, control the total amount of food and eating speed at each meal, and lie down and rest for 15 to 30 minutes after eating.