(1) The dietary principles for breast cancer patients are as follows: ① Be flexible with the treatment. Patients with breast cancer should make efforts to eat and supplement nutrition before and after surgery. During the radiotherapy period, the diet of patients should be light and palatable, and should not include more thick and greasy food. ②Reasonable arrangement and smart cooking. After the completion of the treatment plan, it is necessary for breast cancer patients to eat foods that are beneficial to the prevention and treatment of breast cancer. Eat more seafood: seaweed, kelp, jellyfish, sea cucumber, tamari, oyster, etc. Beans: mung beans, adzuki beans, mung bean sprouts, etc. Vegetables: taro, water chestnut, wild rice, winter melon, portobello mushroom, monkey mushroom, shiitake mushroom, tomato, etc. Fruits: oranges, apples, hawthorn, fresh kiwi, etc. Others: turtle, snapper, black fish, barley, wood ear and other foods. ③Depending on the condition, white ginseng or American ginseng should be taken during the treatment period, and after the treatment is over, every winter, ginseng can still be taken as a supplement. ④Eating should be moderate and not excessive. Excessive nutrition and obesity have a negative impact on the treatment of breast cancer. In the long-term life of breast cancer patients after treatment, they should adhere to the principle of diet in moderation but not in excess, while ensuring nutritional needs. The total daily intake of calories, fats and sugars should be well known, and overeating and binge drinking should be avoided. (2) Breast cancer patients can choose the following dietary methods: ① ovarian dysfunction can be used as seahorse, sea cucumber, oyster chicken, bee’s milk, hashish; ② immune enhancement, anti-relapse, available burdock vegetable, mulberry, kiwi, asparagus, pumpkin, shrimp skin, crab, mackerel, jujube, onion, leek, garlic, sago tongue, prawns, barley, beans, yam, snake, shiitake, mushroom, organic germanium; ③ anti-infection, anti-ulcer. snapper, crucian carp, shark, green scaled fish, Ulva, horseshoe crab, mother-of-pearl, oyster mussel, swordfish, scallop, sea eel, porpoise, sea worm, eggplant, golden needle, turnip, white fruit, grapes, marjoram, amaranth, rape, Chen Xiaofen, shallot; ④ oedema, barley, loofah, adzuki bean, crucian carp, pangasius, pangasius, kelp, mud fish, yellow catfish, taro, grapes, snail, safflower, lychee, water chestnut; ⑤ For pain relief and prevention of nipple retraction, use fennel, giant mayfly shrimp, sea dragon, orange cake, cephalotaxus, persimmon, orange, and horseshoe crab.