Usually, after surgery, rectal cancer patients need to fast first, and after exhausting gas, they can eat moderate amount of liquid food such as rice soup, noodle soup, etc., and after one week, they can enter into semi-liquid food, and then gradually transition to normal diet. After surgery, rectal cancer patients need to fast first, and after exhausting, they can start to eat a small amount of well-digested rice soup, vegetable soup, noodle soup and other fluids, and eat less and more meals. One week after surgery, you can eat semi-liquid food such as noodles, rice, etc. After two weeks, you can gradually eat small amount of easy-to-digest food. Do not eat coarse grains and fibrous vegetables, such as celery, leeks, etc., in order to reduce the burden on the intestinal tract. When discharged from the hospital, you can eat more pears, apples, bananas, oranges, watermelons and other fruits appropriately, as well as increase the intake of protein and other foods to promote the repair of the body tissues, avoid eating raw and cold, hard, deep-fried and pickled foods, abstain from smoking and alcohol, and develop the habit of regular defecation. It is suggested that rectal cancer patients should eat less and more frequent meals, reasonably match their diets and have regular checkups, go to the hospital in time and adjust their dietary regimen if they have any discomfort.