In the hearts of the general public, gastrointestinal surgery is a major operation, and it is an operation in the gastrointestinal tract, so how to eat is an issue of great concern to patients and their families. After a major surgery, the first thing that patients’ family members think of is to get some ginseng, bird’s nest or other tonic, but maybe this arrangement is not good for the patients, so how should patients eat reasonably after surgery? Let’s discuss the post-operative dietary considerations for gastrointestinal tumor patients. First of all, surgery is an invasive operation, which is a “blow” to the patient’s body. After passing through the period of functional inhibition, gastrointestinal function gradually recovers, and patients can eat a liquid diet after their anus is exhausted and there is no abdominal pain and bloating (some units carry out rapid recovery system, so eating is slightly earlier). The principle of early feeding is small and frequent. It is recommended that patients be given no more than 50 ml of water for the first postoperative meal, and only after there is no discomfort should they be allowed to eat an easily digestible, high-calorie liquid diet, such as rice soup, juice and broth. After patients have eaten liquid diet for 1~2 days without nausea and vomiting, abdominal pain and bloating and other uncomfortable symptoms, patients can eat semi-liquid diet, such as rice porridge and noodles, etc. If abdominal bloating and other discomfort occurs, do not force to eat, and need to report to the doctor, who will make suggestions to exclude possible intestinal obstruction according to symptoms and signs. The patient’s general condition is good and there is no discomfort after eating semi-liquid food, which means that the patient’s gastrointestinal function has basically recovered, but compared with normal people, their gastrointestinal function is weaker, and then the family can change semi-liquid food to soft food for the patient. The basic principle is still a small number of times. In addition, it should be noted that after the patient is discharged from the hospital, he still needs to regulate the diet should be nutritionally balanced, with easy digestion, more nutrition and less frying, and should also take into account the high protein and the right amount of trace elements, especially within two weeks after discharge, still need to focus on a light diet, bird’s nest, ginseng and then put it later. A light diet, adequate dietary fiber intake and appropriate exercise can promote the excretion of feces, which is beneficial to the human body. “A good diet can greatly reduce the incidence of gastrointestinal diseases, both normal people and post-operative patients should develop a good eating habit. In general, after the patient’s gastrointestinal surgery, as the patient’s family, besides encouraging the patient to face the disease positively, we should also pay attention to the patient’s postoperative dietary care. A disciplined diet, regular living, a reasonable dietary structure, less fried, smoked and salted food and proper exercise are all necessary for both patients and normal people.