Breast cancer patients are generally weak, so they should increase the intake of protein and sugar during chemotherapy, and eat less high-fat and high-cholesterol food, especially protein intake, such as lean pork, beef, chicken or fish. The diet should be diversified, with meat and vegetables, acid-base balance, and pay attention to the color, aroma and taste of food. Patients who are anorexic can eat some appetizing foods such as hawthorn, radish and kumquat to increase their appetite. 2. Eat foods rich in anti-cancer ingredients: The following are some of the foods that have certain preventive and curative effects on breast cancer patients: (1) cabbage, cabbage, kale, etc. contain indole-3-methanol, an anti-cancer substance, which can prevent the induction of tumor cells by carcinogens in the body and inhibit tumor growth; (2) garlic, onion, etc. contain allicin, which can block the synthesis of nitrosamines, and also contain vitamin C, vitamin A, etc., which can play an anti-cancer role. (3) bean products such as tofu, soy milk and soy sprouts are rich in phytoestrogens, which can play an anti-cancer role; (4) asparagus contains histone, which has been proven to be effective in controlling the growth of breast cancer cells. In addition, seaweed, seaweed and tomatoes contain anti-cancer ingredients, which are beneficial to breast cancer patients when consumed regularly. Fresh fruits such as watermelon, kiwi, apricot, apple, pear and strawberry are rich in vitamin C and vitamin B, which have certain anti-cancer effects. Moreover, jujube not only contains hawthorn acid and other anti-cancer ingredients, but also has a therapeutic effect on the reduction of white blood cells and platelet reduction caused by chemotherapy, so breast cancer patients can often consume jujube during chemotherapy. 4. Reasonable arrangement of diet and chemotherapy: On the day of chemotherapy, the diet should be light and tasty; when chemotherapy is administered intravenously on an empty stomach, food should be eaten 3 hours before chemotherapy, when the food is basically digested and emptied, and dinner should be eaten later after chemotherapy to reduce the symptoms of nausea and vomiting. When taking chemotherapy drugs orally, it is better to take them half an hour after meals, when the blood concentration reaches its peak, when there is already a fasting state, the digestive tract reaction will be lighter. Chemotherapy vomiting can be held in the mouth ginger slices, for anti-vomiting will help.