There is no special diet for breast cancer patients, except for taking medications during treatment or avoiding food as prescribed by the doctor due to changes in their condition. Breast cancer patients should try their best to eat before and after surgery to supplement their nutrition. Rich nutrition can facilitate the body to go through the surgery smoothly, promote the healing of incision, strengthen the body, recover health as soon as possible, and facilitate the subsequent treatment. During radiotherapy and chemotherapy, due to the adverse effects brought about by the treatment, the patient’s taste and appetite are reduced and gastrointestinal reactions such as nausea and vomiting can occur, which are temporary side effects. Patients should insist on eating moderate amounts of easily digestible and highly nutritious food to ensure that the body can accept and complete various treatment plans on schedule. Diet should be moderate and not excessive Over-nutrition and obesity can have adverse effects on breast cancer patients. Therefore, during the long-term life of breast cancer patients after treatment, they should adhere to the principle of diet with moderation but not excessive, while ensuring nutritional needs, to avoid excessive weight gain and obesity. Reasonable choice of food It is beneficial to choose foods that are beneficial to the prevention and treatment of breast cancer, such as seafood like kelp and sea cucumber, or such as bean foods and vegetables and fruits, which should be supplemented with necessary vitamins, electrolytes, minerals and trace elements. Of course, these foods can be adopted from person to person, from time to time and from place to place, and there is no need to force consistency.