Due to the gastrointestinal reaction caused after chemotherapy, appetite will be significantly reduced. In terms of dietary regimen, the following aspects should be supplemented: 1. protein supplementation, choose low-fat protein, such as chicken, duck, fish, loach and eel, also some dairy products, and plant-based protein; 2. fat intake problem, high fat and high cholesterol may increase the risk of breast cancer recurrence, so the intake of high fat and high cholesterol should be limited, and the general requirement of fat intake Water supplementation during chemotherapy, the drugs are metabolized by liver and kidney, water supplementation is irreplaceable by other nutritional factors, drinking about 3000mL of water daily can promote the excretion of metabolites related to chemotherapy drugs and protect liver function and kidney function; 4, carbohydrate supplementation, about 3/5 of total energy daily; 5, vitamin supplementation The vitamin supplementation, more fruits, such as kiwi, pear, apple; 6, dietary fiber, can promote intestinal peristalsis and reduce the occurrence of constipation. It is recommended not to take some health products, try to get the supplement from the diet.