Vitamin A can promote tissue regeneration and accelerate wound healing; vitamin K is mainly involved in the coagulation process and can reduce intraoperative and postoperative bleeding; B vitamin deficiency can cause metabolic disorders and affect both wound healing and tolerance; vitamin C can reduce capillary permeability, decrease bleeding and promote tissue regeneration and wound healing. Therefore, breast cancer patients must eat more vitamin-rich fruits (or fruit food), vegetables (or vegetable food), or supplemental vitamin tablets before surgery. Generally, breast cancer patients should fast 12 hours before surgery and abstain from water 4-6 hours before surgery to prevent vomiting or complications of aspiration pneumonia during anesthesia or surgery, and if there are food residues in the gastrointestinal tract, it will also affect the smooth progress of surgery. What are the considerations of diet after breast cancer surgery? Breast cancer patients have low appetite, nausea, vomiting and diarrhea after surgery due to the application of some other medications. As the disease has already caused a great impact on the body, breast cancer patients are even weaker after surgery. At this time, the post-operative diet for breast cancer patients is especially important. Breast cancer patients should avoid eating raw onion and garlic, pork, pumpkin, alcoholic wine, and foods that are spicy, fried, greasy, thick and fishy, stale, moldy, and other foods that help fire and produce phlegm and hinder spleen movement. After breast cancer surgery, you can give products that benefit qi and nourish blood, regulate qi and disperse knots to consolidate the effect of treatment and facilitate recovery. Such as yam powder, spinach, loofah, kelp, hawthorn, rose hips, etc. A high carbohydrate diet can supply breast cancer patients with enough calories, reduce protein consumption, prevent hypoglycemia, and also protect liver cells from damage by anesthetics. In addition, it can also increase the body resistance and increase calories to compensate for the heat consumption of breast cancer patients caused by insufficient food after surgery. During radiotherapy, the patient’s diet should be light and palatable, and should not include more thick and greasy food. Breast cancer patients generally suffer from blood loss, loss of appetite, decreased digestive and absorption function, and poor stool after surgery, resulting in malnutrition, which affects the recovery of the body after surgery. Overnutrition and obesity have a negative impact on the treatment of breast cancer. In the long-term life of breast cancer patients after treatment, they should adhere to the principle of diet in moderation but not in excess, while ensuring nutritional needs. In the dietary arrangement, the total daily intake of calories, fats and sugars should be well known, and overeating and binge drinking should be avoided. A balanced diet is the best way for cancer patients to maintain normal weight after surgery. The diet should be balanced, diversified, not biased, not taboo, with meat and vegetable, coarse and fine. Use more steaming, boiling and stewing when cooking and try to eat less fried food. Breast cancer patients need to consume enough protein. Lack of protein in the diet can cause malnutrition and edema, which is detrimental to wound healing and recovery after breast cancer surgery. A high-protein diet can alleviate the excessive protein consumption caused by certain diseases, reduce post-operative complications and enable breast cancer patients to recover as soon as possible.