1. Timing: After the patient has defecation or continuous exhaust (fart), wait for the competent physician to remove the gastric tube, if the gastric tube is removed in the morning, you can start to feed water in the afternoon, if the gastric tube is removed in the afternoon or in the evening, you should wait until the next day to feed water. After eating water without abnormality, after being instructed and allowed by the competent physician, gradually transition according to the order of water, clear water, fluid food, semi-fluid, soft food and general food. 2. Types: (1) Water: warm water, start drinking after removal of gastric tube, after permission from the physician in charge, and control the total amount to <300ml. (2) Clear flow: rice soup, soy milk, juice. (3) Flow: lotus root powder, thin rice porridge, sesame paste, egg custard, noodle soup, vegetable soup, meat soup, fish soup, chicken soup, pork rib soup, honey. (4) Semi-stream: rotten noodles, rice porridge, meat floss, vegetable puree, meat puree (fish, chicken, pork) fruit puree, cereal porridge, tofu brain. (5) Soft food: vegetables (steamed, stewed, boiled), meat (steamed, stewed, boiled, poached), tofu, boiled eggs, etc. 3. Principles: (1) Eat less and more, chew more, and increase the amount of food gradually, so that there is no vomiting, no abdominal distention, and smooth bowel movements after eating. (2) the number of times to eat 5 to 6 times is appropriate, in addition to three meals a day, each meal between the additional meal, eating should be seven minutes full is appropriate. (3) should try to drink as much water and juice, water must be boiled, fruit peeled and washed, must ensure clean hygiene. (4) Avoid eating raw, cold, hard, spicy, too hot. (5) Avoid eating coarse grains: millet, beans and rice, corn porridge, nuts, etc. (6) Eat less fried, stir-fried, cooked and deep-fried food. (7) Normal general diet can be gradually resumed one month after surgery according to the situation.