Renal cell carcinoma is the most common solid tumor of kidney, accounting for about 90% of all renal malignant tumors, mainly seen in men, with a male-to-female ratio of 1.5:1, and the peak age of incidence is 60-70 years old. However, the etiology of kidney tumors is still unclear, and the occurrence of kidney cancer is the result of a combination of many factors. Lifestyle (smoking), obesity, and hypertension are three independent factors associated with an increased risk of kidney cancer. The duration of smoking is directly related to the prevalence, and it is believed that smokers have increased levels of various mutagenic active substances in the urine and that dimethylnitrosamines in tobacco cause kidney cancer. In addition, food and drugs related to kidney cancer have been reported: high intake of dairy products, animal protein and fat, low intake of fruits and vegetables are risk factors for kidney cancer, and aromatic hydrocarbons, aromatic amines, aflatoxins, estrogens, coffee and diuretics can cause kidney cancer. Therefore, the best way to prevent or avoid kidney cancer in daily life is to: 1. establish good living habits, do not overeat, control weight, quit smoking and alcohol: exercise more, work and rest regularly, quit smoking and limit alcohol; 2. control diabetes and hypertension: avoid sugary drinks, limit the intake of high energy density foods, especially high sugar foods, or low-fiber, high-fat processed foods, such as hamburgers, French fries, etc.; 3. etc.; 3. Eat less food from the barbecue: grilled fish and meat should be grilled to avoid burning the gravy. Directly on the fire grilled fish, meat, grilled meat can only occasionally eat. It is better to boil, steam or stir-fry food; 4. Pay attention to food diversification, mainly plant food, which should account for more than 2/3 of each meal, and the recipes of cancer patients should not be simple and single, with a balanced nutritional structure and more high-quality protein (such as fish); 5.