For breast cancer patients, the dietary issues during and after treatment are of concern. For breast cancer patients after diagnosis, there are only two types of diets that are not suitable for domestic and foreign consensus: placenta-based products, royal jelly and propolis products. A study on post-diagnosis diet confirmed that there is no relationship between dietary fat intake and survival rate. 3. A study confirmed that consuming high protein from poultry, fish, and dairy products resulted in better survival. 4. Studies have confirmed that there is no particular correlation between the intake of high amounts of fruits, vegetables, dietary fiber and survival. 5. Some studies suggest that avoiding weight gain after breast cancer diagnosis will improve the prognosis. To conclude, the existing domestic and foreign studies suggest us that the prognosis of breast cancer patients and their diet are not very closely related. The vast majority of foods are safe for us to consume. There are not as many contraindications as we have heard among patients. The contents of contraindications in Chinese medicine theory have not been confirmed in scientific controlled studies either. Therefore, it is recommended that the majority of patients maintain a relaxed and happy mood, grains and cereals, chicken, duck, fish, fruits and vegetables, onions and garlic can not be enjoyed, in moderation, they are happy.