In the process of killing tumor cells, chemotherapy will also bring some side effects, such as decreased immunity, nausea, vomiting, loss of appetite, decreased white blood cells, etc., which will affect the normal course of chemotherapy, therefore, during the chemotherapy period, attention should be paid to dietary regimen to restore physical fitness and enhance immunity, so as to successfully complete chemotherapy. Breast cancer patients are generally weak, so during chemotherapy, they should increase the intake of protein and sugar, 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 a balance of meat and vegetables, acid and alkaline, and pay attention to the color, aroma and taste of food. Patients with anorexia can eat some appetizing foods such as hawthorn, radish and kumquat to increase their appetite. Research shows that the following types of food have certain preventive and curative effects on breast cancer patients: cabbage, cabbage, kale, etc. contain indole-3-methanol, which can prevent the induction of tumor cells by carcinogens in the body and inhibit the growth of tumor; garlic, onion, etc. contain allicin, which can block the synthesis of nitrosamines, and also contain vitamin C and vitamin A, which can play an anti-cancer role; tofu, onion, etc. contain allicin, which can block the synthesis of nitrosamines. Tofu, soy milk, soy sprouts and other soy products are rich in phytoestrogens, which can competitively inhibit the effect of estrogen in the body and play an anti-cancer role; asparagus contains histone, which has been proven to be effective in controlling the growth of breast cancer cells. In addition, seaweed, nori and tomatoes are rich in anti-cancer ingredients, which can be beneficial to breast cancer patients. 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. Dates not only contain hawthorn acid and other anti-cancer ingredients, but also have therapeutic effects on the reduction of white blood cells and platelet reduction caused by chemotherapy, so breast cancer patients can often consume dates during chemotherapy. 4. Reasonable arrangement of diet and chemotherapy Chemotherapy can often cause nausea, vomiting and other gastrointestinal reactions, so it is necessary to arrange the diet reasonably during chemotherapy. On the day of chemotherapy, diet should be light and tasty; through intravenous chemotherapy when fasting, so you should eat 3 hours before chemotherapy, when the food has been basically digested and emptied, and dinner later after the end of 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.