Obesity is a public health problem affecting the whole world, it is closely related to diabetes, hyperlipidemia, coronary heart disease, hypertension and other diseases, and at the same time, it is directly related to colorectal cancer, breast cancer, prostate cancer, bladder cancer and so on. The most fundamental cause of obesity is high-fat, high-calorie diet, as early as 2000 years ago, our ancients have found that high-fat, high-calorie and metabolic diseases and tumors relationship, “Neijing. Su Wen” cloud: “the five flavors of the entrance, hidden in the spleen and stomach, in order to line its essence, fluid in the spleen, so that the population is sweet, this fat and beautiful hair, its gas on the overflow, turned into thirst,” traditional Chinese medicine believes that partiality to sweet and thick, brewing moisture and heat; alcoholism, overfeeding, over-eating sweet and thick and impure diet, easy to injure the spleen and stomach, food stagnation, dampness, stagnation of gas can be transformed into heat for a long time, leading to the body Naoze, high calorie diet, high fat and high heat. Leads to the body Naoze (obesity), thirst (diabetes), accumulation (constipation, intestinal tumors, etc.), which also reflects the “disease enters by the mouth” basic concept. Peking University International Hospital Jin Heiying said in more than 10 years for diet-related obesity and colon cancer research, based on the proposed “treatment of medicine, prevention of disease selection of food” point of view, especially some of the food with heat detoxification effect, which not only has the function of lowering blood lipids, reduce body weight, laxative, but also has the prevention of colorectal cancer, Breast cancer, prostate cancer and other cancers, and food source components, almost no toxicity, can be consumed for a long time. Common with the inhibition of anti-cancer and lipid-lowering foods are tea, especially fermented tea and semi-fermented tea, onions, lotus leaves, amaranth, blueberries, Job’s tears, hawthorn, etc.: 1, tea Tea Tea is the most important drink for the Chinese, but also an important medicinal and food plants, “Shen Nong’s Classic of the Materia Medica” is recorded in the “Shen Nong tasted all kinds of herbs, encountered seventy-two poisons, and got the Tantalum and the solution of the “. Modern research suggests that tea polyphenols in tea is the main active ingredient, with anti-cancer, blood lipid, diabetes regulation, soften blood vessels, weight loss and other efficacy; especially after fermentation of tea to form black tea tea polyphenols are more easily absorbed, and in the process of fermentation produced by the goldenrod to improve the tea lipid, cancer, laxative, weight loss, soften blood vessels function. 2, onion onion is currently a very common food, a large number of studies show that onion has a hypolipidemic, hypotensive, weight loss and prevention of various cancers, we found that the intervention of hyperlipidemia in colon cancer model, can reduce blood lipids and inhibit the role of colon cancer, the results of the “Cancer Target Genes and Therapeutics” published in the journal. 3, Lotus leaf Lotus leaf has the effect of heat and dampness, “Compendium of Materia Medica” in the “Lotus leaf to promote Yang Qi, fat and thin body”, now research shows that the lotus leaf in the lotus leaf has the effect of decomposition of fat, elimination of constipation, prevention of cancer. 4.Blueberry Blueberry is a kind of food with health care efficacy that has emerged recently, especially blueberry is rich in anthocyanin, which has obvious fat-lowering and cancer prevention effect, especially the sugar in blueberry is removed after fermentation, its fat-lowering and cancer prevention effect is more obvious. 5, amaranth Amaranth is a kind of traditional Chinese medicine, but also is a kind of commonly used vegetables, amaranth in the flavonoid composition not only has the effect of lowering blood fat, clearing dampness and heat, lowering body weight, recent research shows that it also has the effect of proliferation of cancer stem cells, and it has a better effect of lipid-lowering and cancer prevention. 6, bitter melon is a kind of heat and dampness effect of food, recent research shows that long-term consumption of bitter melon has significantly lower body weight, reduce blood fat and treatment of diabetes, but also has the role of cancer prevention, a recent study at Shanghai Jiao Tong University, bitter melon can regulate the intestinal flora, so that the colon in the destruction of the bacterial groups to be repaired, so as to play a health care effect. In addition, garlic, barley, hawthorn, bitter chrysanthemum, chrysanthemum and other foods have similar effects, in our daily life, we can consciously choose these foods to eat, can play a health effect, but not too single, affecting the quality of life.