(1) Eggplant is sweet and cool in nature, with the effect of dispersing blood and relieving pain, diuretic and detoxification. Mainly contains lobeline, the content of which is more than that of purple-skinned eggplant, animal experiments have proved that this substance can inhibit digestive system cancer and rectal cancer. (2) Chinese cabbage is sweet and flat, with the function of relieving fever and relieving irritation, and promoting the function of intestine and stomach. Scientists believe that the crude fiber contained in it has the function of laxative to stimulate gastrointestinal peristalsis, which can make the carcinogenic substances produced by pollution or decomposition excreted as soon as possible, so as to reduce intestinal absorption and local stimulation of intestinal wall. (3) Garlic is pungent, warm and has a strong stimulating odor. It contains volatile oil, the main component of which is allicin, a kind of plant bactericide, and contains sulfur, selenium and germanium, selenium has cancer inhibiting effect, germanium can prevent stomach cancer, and organic germanium can promote blood circulation, induce internal kiloprosence, induce macrophages into anti-cancer macrophages, and enhance the resistance of rectal cancer patients’ lesion cells. (4) Mushrooms, including shiitake mushroom, shiitake mushroom, huitake mushroom and monkey head mushroom, mainly contain polysaccharide components. Scientific experiments have proved that polysaccharides in them can regulate the immune function of human “anti-cancer system”, thus inhibiting the growth of rectal cancer and reducing the symptoms of rectal cancer patients.