Since breast cancer itself has little relationship with diet, there is no food that is beneficial to the treatment of breast cancer, but you can choose some nutritious food to eat by combining Chinese and Western medical theories, as well as choosing a reasonable cooking method. From the analysis of TCM, it is suggested that breast cancer patients should eat ingredients with the effect of softening and dispersing knots, such as barley, kelp, sea cucumber and shellfish, which may be beneficial to tumor patients. Although these foods may have certain benefits, they are still not a substitute for clinical treatment, and active treatment is still needed after the appearance of cancer. From the perspective of modern medicine, a single food does not have much effect on breast cancer. In terms of diet, breast cancer patients need to have a light diet, balanced nutritional intake and diversified diet to meet their nutritional needs. The prerequisite is that the patient does not have digestive system or endocrine system diseases, such as gastrointestinal bleeding, diabetes, hyperlipidemia, etc. Breast cancer patients can eat foods rich in high quality protein such as eggs, milk, lean meat, shrimp, etc. At the same time, they can eat more fresh fruits, nuts and vegetables such as kiwi, apple, avocado, walnuts, carrots, tomatoes, etc. to supplement the right amount of trace elements. In addition to balanced nutrition, since some breast cancers are hormone-related, it is important to forbid hormone-based foods to avoid aggravating the disease, such as royal jelly and certain pollen-containing foods, and to eat less spicy, cold and allergenic foods. In addition, breast cancer patients should pay attention to eating according to medical advice during examination and treatment to avoid conflicts with treatment drugs and examination after eating. Breast cancer patients should also pay attention to quit smoking and alcohol, avoid staying up late, and more importantly, maintain a comfortable mood, avoid negative emotions such as anxiety and depression, and face their disease correctly.