After surgery, due to the weakness of the body and the fragility of the digestive system, it takes a period of time to adjust to normal after surgery. Therefore, there is no need to eat special nutritional products for nourishment after surgery, so as not to increase the burden on the gastrointestinal tract and cause indigestion, which is not conducive to postoperative recovery. After surgery, if the patient has normal exhaust, the doctor informs the patient that he/she can eat and does not need to fast, and that he/she can eat appropriately according to the specific situation of surgery to supplement the nutrition of the organism. In the case of surgery on the gastrointestinal tract as well as the oropharynx, it is usually necessary to eat a warm and cool liquid diet, such as rice soup, green vegetable soup, clear fish soup, etc., first after surgery. Gradually transition to a semi-liquid diet, such as batter, rotten noodles, and vegetable porridge. If there is no physical discomfort, then resume normal general diet with appropriate foods high in protein and vitamins, such as beef, fish, eggs, and various fresh vegetables and fruits. In the case of surgery on other parts of the body, such as fracture surgery, appendectomy surgery, etc., the patient can eat semi-liquid food such as puree or vegetable puree, egg custard, minced meat porridge, wontons, rotten noodles, sesame paste, etc. after he/she is awake and has normal exhaustion. Gradually return to a general diet, i.e. high protein, high fiber and high vitamin food, mainly meat, eggs, milk, fresh fruits and vegetables and cereals. The postoperative diet needs to be more nutritious, but should be light, with less oil, salt and sugar. At the same time, although dairy products and soy milk have high nutritional value, patients with gastrointestinal surgery should drink as little as possible to avoid abdominal flatulence. In addition, there are dietary contraindications after some surgeries, such as patients with uterine fibroids should avoid eating foods with more estrogen, such as beans as well as royal jelly. In the case of postoperative coma patients, who may not be able to eat through the mouth, high-calorie, high-protein fluids can be given by nasal feeding.