1.Establish a good lifestyle, adjust the rhythm of life, and maintain a relaxed mood. 2, adhere to physical exercise, actively participate in social activities, try to avoid or reduce mental tension, keep a calm state of mind. 3, develop good eating habits, infancy, pay attention to balanced nutrition, promote breastfeeding; child development period, reasonable control of high-protein diet intake; adolescence do not consume excessive fat and animal protein, strengthen physical exercise; menopause to control the total calorie intake, to avoid obesity; usually develop the habit of not excessive intake of meat, fried eggs, butter, cheese, sweets, etc., less pickled, smoked, fried, baked Food, eat more fresh vegetables, fruits, vitamins, carotene, olive oil, fish, soy products, etc. 4.Actively treat breast diseases. 5. Do not use exogenous estrogen indiscriminately. 6.Do not drink alcohol in excess. 7.Drug-based prevention, drug-based prevention among people with high risk of breast. The National Cancer Center has conducted an exploratory study on the prevention of breast cancer with triamcinolone and raloxifene in recent years. As breast cancer research continues, better preventive drugs and more definite findings will be found, and the facts will eventually tell people that breast cancer is not only treatable but also preventable.