Patients with breast cancer usually undergo radiotherapy and chemotherapy before surgery, and these treatments may affect patients’ appetite and sense of taste. At this time, patients may feel a decrease in appetite, do not want to eat, or even have gastrointestinal reactions such as nausea and vomiting, and if no timely measures are taken, malnutrition and reduced resistance will occur, leading to infection. Therefore, tumor patients should pay special attention to diet and reasonable nutrition during chemotherapy, in order to improve the body’s tolerance to chemotherapy, ensure the successful completion of chemotherapy and promote recovery. For chemotherapy patients, seasonings can be added to the food, such as sweetness and freshness to stimulate appetite. Breakfast is eaten earlier in the day and dinner is eaten later in the day, so that the time in between can reduce nausea and vomiting. During chemotherapy, attention should also be paid to a planned intake of adequate calories and nutrition. Eat nutritious foods such as meat, eggs, milk, fish and soy products; eat a diet rich in vitamin A and C, such as green vegetables and fruits; do not eat food that is too hot, too hot, too hard, moldy or smoky; constipated patients should eat laxative foods such as bananas and honey. After the treatment plan is completed, breast cancer patients should eat in moderation and not in excess, because excessive nutrition and obesity have a negative impact on the occurrence and development of breast cancer. Therefore, breast cancer patients should not consume too much fat and sugar to avoid over-nutrition or obesity. During the recovery period, breast cancer patients should eat more anti-breast cancer foods to prevent the recurrence of breast cancer. Common anti-breast cancer foods include soybeans, radish, dates, tomatoes, sweet potatoes, garlic, onions and cabbage. A reasonable diet arrangement plays an important role in the prevention and treatment of breast cancer. Breast cancer patients should first reduce psychological pressure, maintain a happy mood and arrange their diet reasonably, all of which will promote early recovery from breast cancer. (1) It is advisable to eat more foods with anti-breast cancer effects, such as seahorses, horseshoe crabs, cobra meat, sperm whale oil, toad meat, crabs, red, clams, oysters, tortoiseshell meat, kelp, asparagus, and stone cauliflower. (2) It is advisable to eat more foods with immunity enhancing and relapse prevention, including mulberry, kiwi, asparagus, pumpkin, jujube, onion, leek, barley, beans, yam, shiitake mushroom, shrimp skin, crab, mackerel, prawns, and snake. (3) Swelling is recommended to eat barley, loofah, adzuki beans, taro, grapes, lychee, water chestnut, carp, pond lice, shark, kelp, loach, yellow croaker, and snail. (4) It is advisable to eat fennel, green onion, shrimp, sea dragon, smear oil whale, orange cake, cephalotaxus, grapefruit, horseshoe crab. Breast cancer dietary considerations: (1) Avoid smoking, alcohol, coffee, cocoa. (2) Avoid spicy pepper, ginger, cinnamon and other spicy stimulating foods. (3) Avoid fatty, fried, moldy and pickled foods. (4) Avoid hairy foods such as rooster.