As we all know, rectal cancer patients need to increase nutrition in their diets, mainly with fresh and easily digestible foods containing various nutrients. Scientific research on diet shows that rectal cancer patients should eat the following kinds of food: 1, eat more seeds, such as mung beans, peas, lentils, adzuki beans, bean sprouts, cereals, potatoes, etc. These seeds are thought to contain compounds that can stop the activity of tumor initiation factor. 2, colored vegetables such as carrots, sweet potatoes, spinach, rape and other foods; can increase the body’s ability to fight cancer, especially carrots are the best among cancer prevention foods. Regular consumption of carrots can reduce the incidence of intestinal cancer. Cabbage and cabbage of kale category contain a substance called indole, which can inhibit the occurrence of cancer. Eating more spinach can clean up heat accumulation in the intestine, reduce the absorption of harmful substances and lower the chance of intestinal cancer. Garlic, scallions and tomatoes have anti-cancer effects; kiwi fruit and barley have certain effects on the prevention and treatment of intestinal cancer, and also have certain anti-cancer effects. 3.Kelp and nori combine a lot of iodine, calcium and carotene, which can transform some toxic organic substances in human body into non-toxic substances, and have the effect of clearing heat, laxative, laxative and intestinal cancer prevention. 4.Multi-evil damage to the gastrointestinal to the maximum.