During chemotherapy for colorectal cancer, a light and digestible diet should be given according to patients' tastes, and a small number of meals should be encouraged. Grapes and watermelons are easy to digest, rich in vitamins and edible. 1, the diet should be thin first, then soft, and gradually adapt to the body before adding other diets. 2, early postoperative can't eat normally, should give priority to with intravenous fluid replacement. 3. It is necessary to ban tobacco and alcohol, as well as spicy and cold foods such as spicy frying, and encourage patients to drink more water and soup.