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”, Chinese medicine believes that partiality to fat, sweet, thick and greasy, brewing wet heat; alcoholism, oversatiety, overfed, fat, sweet, thick and unclean food and drink, easy to injure the spleen and stomach, food stagnation, dampness, stagnant gas can be transformed into heat for a long time, resulting in a body Naoze (fat), high calorie diet. This can lead to body nausea (obesity), thirst (diabetes), accumulation (constipation, intestinal tumors, etc.), which also reflects the basic concept of “Illness enters by the mouth”. 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 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 and so on. Tea: Tea is the most important beverage for Chinese people, and it is also an important plant for medicinal and food purposes. The Divine Husbandman’s Classic of the Materia Medica recorded that “Divine Husbandman tasted all kinds of herbs, and encountered seventy-two poisons, which he was able to solve by using tea”. 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 effects; 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. Onion: onion is currently a very commonly used food, a large number of studies have shown that onion has the effect of lowering blood lipids, lowering blood pressure, lowering body weight and preventing a variety of cancers, we have found that the intervention of hyperlipidemia in the colon cancer model, can reduce blood lipids and inhibit the role of colon cancer, the results in the “Cancer Target Genes and Therapy” journal published. Lotus leaf: Lotus leaf has the efficacy of heat and dampness, “Compendium of Materia Medica”, there is “lotus leaf to promote Yang Qi, go fat and thin body”, and now research has shown that the lotus leaf in the lotus leaf of the lotus leaf alkaloids have the role of decomposition of fat, elimination of constipation, and the prevention of cancer. Blueberries: blueberries are a recently emerged food with health effects, especially blueberries are rich in anthocyanins, with obvious fat-lowering and anti-cancer effects, especially the sugar in blueberries after fermentation to remove, its fat-lowering and anti-cancer effects are more obvious. 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 role of lowering blood lipids, clearing dampness and heat, reduce body weight, recent research shows that it also has the role of proliferation of cancer stem cells, has a better lipid-lowering and anti-cancer effect. Bitter melon: is a kind of heat and dampness effect of food, recent studies have shown 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 Jiaotong University, bitter melon can regulate intestinal flora, so that the colon in the destruction of the bacterial flora 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.