Since the formation and development of colorectal cancer are closely related to diet, diet is an important aspect in the prevention and treatment of colorectal cancer, and a reasonable diet is beneficial to the recovery of the disease. Don’t eat too much fat, the total amount of fat should account for less than 30% of total caloric energy, the ratio of animal and vegetable oils should be appropriate, the diet should pay attention to eating more vegetables rich in dietary fiber, such as celery, leek, cabbage, radish and other green leafy vegetables, dietary fiber-rich vegetables can stimulate intestinal peristalsis, increase the number of bowel movements, and take away carcinogenic and toxic substances from the stool. If colon cancer bulges into the intestinal cavity and the intestinal cavity becomes narrow, the intake of dietary fiber should be controlled, because the intake of too much dietary fiber will cause intestinal obstruction. At this time, easy-to-digest, soft and semi-fluid food should be given, such as millet porridge, thick lotus root soup, rice soup, congee, cornmeal porridge, egg custard, tofu brain, etc. These foods can reduce the stimulation to the intestinal tract, pass through the intestinal cavity more smoothly and prevent the occurrence of intestinal obstruction. In addition, less irritation, patients mostly have blood in the stool, so they should forbid to drink strong wine, hot and spicy food and other irritants. Patients with advanced colorectal cancer have prolonged diarrhea, fever and deficiency of both blood and qi, so they should take highly nutritious tonic juice diet for 2-3 days, during fasting, gastrointestinal decompression, intravenous rehydration and appropriate application of antibiotics. Peristalsis is restored, after the anal venting stop gastrointestinal decompression, give full liquid diet for 2-3 days, such as juice, ginseng soup, bean juice, etc.; if there is no abdominal distension can enter the semi-liquid food such as rotten noodles, eggs, etc.; about 1 week can enter the diet. It is not advisable to eat gas-producing, indigestible and stimulating food, such as onion, radish, various kinds of meat, chili, etc. During the postoperative recovery period, it is necessary to reasonably supplement the high diet. In conclusion, clinical implementation of early enteral nutrition for postoperative colon cancer patients can effectively improve their nutritional status. Meanwhile, it can accelerate the recovery of their immune function and improve their resistance.