Colorectal cancer is related to long-term high-fat and low-fiber diet, and postoperative dietary care plays a very important role in patients' early recovery. After colon cancer surgery, the patient's diet should start from thin to soft, and then add other diets after the body gradually adapts. Sugar, fat, protein, minerals, vitamins and other foods should be reasonably matched. There should be cereals, lean meat, fish, eggs, milk, various vegetables and bean products every day, and the amount of each should not be too much. Only in this way can we supplement all kinds of nutrients needed in the body. Be careful not to eat too much fat, the total fat accounts for less than 30% of the total heat energy, and the proportion of animal and vegetable oil should be appropriate. We should pay attention to eating more fresh vegetables and fruits containing various vitamins. Foods rich in cellulose, such as asparagus, celery, leek, cabbage, radish and other green leafy vegetables, can stimulate intestinal peristalsis, increase the frequency of defecation, and take away carcinogenic and toxic substances in feces. It can not only prevent constipation, but also prevent diarrhea to a certain extent, and ensure regular defecation every day. Postoperative patients with colorectal cancer should eat more foods rich in potassium, such as apples, oranges, corn, fish and lean meat. Patients with intestinal cancer are forbidden to eat spicy food. Chili, Chili and other foods have a stimulating effect on the intestine and must not be eaten. Patients should keep a regular diet after discharge, pay attention to food hygiene at ordinary times, do not eat raw, cold, hard, fried and pickled food, avoid alcohol and tobacco, and form a good habit of regular defecation. In order to facilitate ostomy care for patients with rectal cancer, it is best not to choose the following foods. Foods that are highly irritating to the intestines, such as cold drinks, raw or incompletely cooked foods; It is best not to drink alcoholic beverages; Foods that are easy to produce gas, such as onions, sweet potatoes, broccoli, beans, radishes, etc. Foods that are prone to odor, such as onions, eggs, chocolate, onions, shrimp, etc. ; Foods that are difficult to digest and easy to cause blockage, such as persimmons, raisins, dried fruits, walnuts, fried foods, etc. Loose stool's food, such as curry, coffee, garlic, essence, etc.