Breast cancer is one of the common malignant tumors in women, and its incidence has jumped to the first place among female malignant tumors in major cities such as Beijing, Tianjin and Shanghai. Surgery is still one of the main methods, and how to take supplements after surgery is an issue of great concern to patients’ families. Ancient people have long recognized that diet is closely related to the development of diseases. In the book of Nei Jing Shanggu Tianzhen, “If you eat and drink in a disciplined manner, if you live and work in a disciplined manner, and if you do not make delusions of labor, you will be able to be in shape and be with God, and you will end your natural life and be 100 years old.” It means that a disciplined diet is an important factor for a healthy life of 100 years. The Complete Book of Surgical Evidence and Treatments on Food and Avoidance states: “Those suffering from gangrene should avoid: chicken, goose, shrimp, crab, seafood. The fishy and stinky genus, all can move the wind and itch. Ancestral medicine has extensively and specifically demonstrated the close relationship between dietary contraindications and diseases. In the treatment of cancer, there are often cases where the disease is repeatedly worsened due to the non-abstinence of fishy and stinky food, which clinically verifies the scientific viewpoint of dietary taboos in Chinese medicine. Thousands of years of Chinese medicine tell us that proper diet is good for health and longevity, while inappropriate diet is one of the important causes of diseases, therefore, the postoperative diet for breast cancer is more important. In the long-term life of breast cancer patients after radiotherapy, diet should pay attention to the following points: 1. Do not eat acid, salt, mold, smoke, coloring, flavoring, do not drink strong alcohol; 3, eat more natural, wild food, less artificial reproduction and refined food; 4, reasonable tonic can improve immunity. Certain tonic products such as ginseng, white fungus, red dates, etc. have direct or indirect cancer suppressing and strengthening effects; 5. Use more steaming, boiling and stewing in cooking, and eat less fried and deep-fried food. Reasonable avoidance of food is a very important aspect in Chinese medicine nutrition. As the ancient physician Zhang Zhongjing said, “The taste of food is suitable for the disease and harmful to the body, if it is suitable, it is suitable for the body, but if it is harmful, it will become a disease, which will lead to danger. According to Chinese medicine, the following are contraindicated after breast cancer surgery: hormone products, clam film oil, chicken, mutton, dog meat, American ginseng, various female health products, royal jelly, propolis, bird’s nest, eel, turtle, etc. In addition, excessive nutrition and obesity are harmful to the treatment. In addition, excessive nutrition and obesity have a negative impact on the treatment of breast cancer, and post-operative breast cancer patients should eat in moderation and not in excess. In the long-term life of breast cancer patients after treatment, they should adhere to the principle of eating in moderation but not in excess, while ensuring the nutritional needs. In the dietary arrangement, the total daily intake of calories, fats and sugars should be well known, and binge eating and drinking should be avoided!