The nutritional status of surgical patients directly affects the success of surgery, so how to eat after gastrointestinal surgery can be both safe and nutritious? 1, fasting phase: early after gastrointestinal surgery, due to surgical trauma and stimulation, gastrointestinal incision inflammation, congestion, edema, gastrointestinal function is temporarily in a state of inhibition, so the patient is required to fast for 2-3 days, during which the patient is observed to have exhaustion, defecation, bloating, intestinal peristalsis recovery, according to the recovery of gastrointestinal function to decide whether to stop fasting. 2, fluid diet phase: 48-72 hours after gastrointestinal surgery, the patient’s intestinal sounds return, no distension, no pain, there is exhaustion, there is a sense of hunger, at this time can remove the gastric tube, changed to a fluid diet. According to the principle of liquid diet, a small amount of water can be given first, not more than 30ml each time, if there is no adverse reaction, the next day, you can enter the easily digestible high-calorie liquid diet, you can choose rice soup, steamed eggs, soy milk, vegetable juice, milk, various kinds of pureed meat soup and diluted lotus root powder. The amount of food should be 100-200ml every time, every 2-3 hours, 5-6 times/day, not to exceed the amount, so as not to overload the gastrointestinal burden. The rest of the nutrition is supplemented by intravenous. 3. Semi-liquid diet stage: after 3-4 days of fluid intake for patients after gastrointestinal surgery, if there is no abdominal distension, abdominal pain, nausea, vomiting, etc., the diet will be changed to semi-liquid diet. Semi-liquid diet: available food is food without dietary fiber, such as boiled noodles, thick porridge, lai mai, fish balls, milk, eggs, etc. It is necessary to have a small number of meals, in order not to cause fullness and discomfort, the main food ration, 5 to 6 meals per day. Generally, intravenous rehydration can be stopped. 4. Soft food and general food stage: patients after 2-3 weeks of semi-liquid diet adaptation process, such as adverse reactions, the party changed to soft food. After 1-2 weeks, the patient feels good and can eat the normal diet. General food can be used, the normal diet includes cereals, animals and legumes, vegetables, fruits and fats. Use less fried and indigestible foods, and strong condiments. It should be noted that patients with gastrectomy should not rush to get out of bed after meals and should not eat a diet high in sugar after meals to prevent dumping syndrome. In addition, to prevent iron deficiency anemia, animal liver, lean meat, poultry eggs, milk, etc. should be added to the diet in appropriate amounts.