The occurrence and development of tumor is a long process, and the “incubation period” of cancer can be years to decades, and in 2006, the World Health Organization (WHO) officially announced the inclusion of tumor into the category of chronic diseases, which means that cancer, which was once regarded as a “terminal disease”, has become a manageable chronic disease. In other words, cancer, which was once regarded as a “terminal disease”, has now become a chronic disease that can be controlled. It can coexist with the body for a long time, just like diabetes and hypertension. At present, more than 120 kinds of malignant tumors have been discovered, and there are dozens of the most common malignant tumors in China. The birth and development of tumor are related to many internal and external factors, such as the factors of the body itself, including mental, endocrine, genetic, immune, etc.. External factors of the body, including physical, chemical biological, living environment, dietary habits, tobacco and alcohol addiction, medical factors, psychosocial factors, etc., therefore, adopting scientific and standardized treatment and improving living environment and lifestyle can effectively delay or even stop the occurrence and development of cancer. First, improve the diet structure and develop good eating habits. 1. Do not eat burnt and fried food. Especially, burnt protein contains a lot of carcinogenic substances, and high-calorie and high-fat diet is related to cancer incidence; 2.No alcoholism, excessive drinking has serious damage to liver; 3.No smoking, because cigarette contains benzopyrene carcinogenic substances; 4.Less pickled products, the country for pickled products have amine nitrite carcinogenic substances; 5.Eat more coarse fiber food, supplement appropriate vitamins, eat more fruits and fresh vegetables, so that the number of stools Eat more coarse fiber food, add appropriate vitamins, eat more fruits and fresh vegetables, so that the number of stools, so that harmful substances in the intestine to shorten the residence time; 6, do not eat moldy food, especially moldy peanuts (rice), beans, etc., will have aflatoxin for carcinogenic substances; 7, choose more food with anti-tumor effects: (1) melon: watermelon, pumpkin, bitter melon, papaya, apple, pear, lemon, loquat, orange, citrus, orange, banana, grape, kiwi, fig, rosemary, hawthorn, umeboshi, olive, strawberry, date, walnut, almond (2) vegetables: garlic, garlic moss, onion, ginger, knife beans, kale, asparagus, eggplant, radish, carrot, bean sprouts, Ulva kelp, seaweed, sea mustard, celery, spinach, cilantro, amaranth, tomatoes; (3) edible mushrooms: silver fungus, black fungus, flat mushroom, shiitake mushroom, mushroom, monkey head mushroom, lettuce; (4) grains: mung beans, soybeans, wheat, buckwheat, corn, sorghum, barley; (5) animals: turtle, turtle, loach, sea cucumber, sea horse, shark, carp, reunion fish Fish fat oyster, clam, snail, earthworm, pit viper, goat’s milk, pig’s blood, goose’s blood; (6) others: pollen, honey, sunflower seeds, tofu, yogurt, vinegar, chrysanthemum, tea. Second, regular physical examination and active treatment of pre-cancerous lesions. Many malignant tumors are likely to be caused by the stimulation of certain carcinogenic factors on the basis of some chronic diseases or benign tumors. Although precancerous lesions may not always turn into cancer, timely and reasonable treatment of these lesions is of great importance to prevent the occurrence of tumors. Such as: mucosal white class, cervical erosion, fibrocystic breast disease, colon, rectum, gallbladder, gastric polyp, atrophic gastritis and gastric ulcer, chronic skin ulcer, esophageal mucosal epithelial hyperplasia, senile solar keratosis, hepatitis B, liver cirrhosis and so on. Thirdly, modern research on the mechanism of Chinese medicine against tumor includes: 1) improving the immune function of the body; 2) improving the hypercoagulable state of blood of tumor patients; 3) reversing the multidrug resistance of tumor cells to chemotherapy drugs; 4) inducing apoptosis of tumor cells and so on. The combination of Chinese medicine with surgery, radiotherapy, chemotherapy and other treatments can significantly strengthen and improve the therapeutic effect; reduce and minimize various toxic side effects, complications and sequelae; consolidate the therapeutic effect and prevent recurrence and metastasis; regulate and restore the functions of the body and internal organs; alleviate the systemic and local symptoms caused by tumor; eliminate patients’ thoughts and behavioral states caused by various factors; and improve tumor patient’s health. It is very useful and necessary to combine Chinese and Western medicine, to support and dispel the evil and to take into account the whole body and the local, so that the treatment of tumor can achieve more ideal effect. Fourthly, cancer prevention and treatment medicine: 1. 10 grams of ginseng, 20 red dates, 250 grams of glutinous rice and 50 grams of sugar. First, wash the red dates and boil them with ginseng for 30 minutes; put the cleaned glutinous rice and appropriate amount of water into a small basin, steam it over water, and place the ginseng and dates on top. In another casserole, boil the juice with sugar to make a thick juice and pour it on the rice with dates. Ginseng and jujube rice is good for blood, spleen and stomach, suitable for tumor radiation and chemotherapy-induced hematopoietic anemia. 2.Kelp meat jelly Kelp contains seaweed polysaccharide, which has strong anti-tumor function, in which “sulfonyl” can kill cancer cells. Soak the kelp and wash it, cut it into shreds, wash the pork with skin and cut it into small pieces, add the right amount of water in the pot, then add cinnamon, fennel and other seasoning, simmer it with a gentle fire to form a rotten mud, add salt, freeze it after it is cold, cut it into strips and serve it with rice. Kelp jelly is suitable for patients with tumors of the thyroid, breast, prostate and other endocrine systems. 3.Powder porridge first use 100 grams of japonica rice to cook porridge, after it is half-cooked, mix in 40 grams of powdered ling and a little brown sugar, and cook together as porridge. It is suitable for patients with esophageal cancer, stomach cancer, breast cancer and cervical cancer. 4.Coix seeds porridge Firstly, wash and dry the coix seeds, grind them into fine powder, take 30-60 grams each time, and boil the porridge with 100 grams of japonica rice for breakfast and dinner. Job’s tear congee is suitable for stomach cancer, intestinal cancer and cervical cancer as an auxiliary diet. 5.Garlic seedling meat package Garlic seedling contains the trace element selenium, which has the function of inhibiting carcinogenic substances in the body and can shrink or even eliminate tumors. Garlic seedlings and meat in the ratio of 4:1 is made into a filling, add appropriate seasonings, make buns and steam for consumption. Garlic meat bun is suitable for all malignant cancer, leukemia, etc. It is a good supplement to prevent the recurrence and metastasis of tumor. Fifth, maintain a good and pleasant mood, cheerful personality, peace of mind, will find their own fun in life.