The following foods can be eaten to prevent rectal cancer: 1. Garlic is a food with medicinal value, and can also achieve the effect of prolonging life, and can effectively prevent the emergence of rectal cancer, garlic contains peroxidase, which can effectively kill malignant tumors and can effectively inhibit carcinogenic substances. Various elements in garlic can effectively promote blood circulation and effectively induce interferon in the body, which can enhance the ability of rectal cancer people to resist the disease. 2. Mushrooms contain plant extracts, which can originally have anti-cancer effects, including shiitake mushrooms, monkey head mushrooms and winter mushrooms, if you can regularly choose to eat mushrooms, you can effectively enhance the ability to resist cancer cells, which also has the effect of preventing rectal cancer. 3. Eggplant is a kind of food regularly eaten in life, which contains lobotropin that can effectively inhibit the proliferation of tumor cells, which can effectively prevent not only hemorrhoid cancer, but also stomach cancer, and also has the effect of diuretic and detoxification.