Tumor patients consume a lot of energy, plus their bodies are weaker, so they should increase 20% more protein and calories than normal people. In principle, high nutrition and complete nutrition are emphasized. If malnutrition has been produced, more protein supplementation is needed. The best protein intake is milk, eggs, fish, lean meat and tofu. In addition, attention should be paid to the selection of fresh vegetables and fruits that are low in fat, salt and rich in vitamins, which are beneficial to their treatment and recovery. In addition to considering nutritional factors, attention should be paid to making full use of anti-cancer substances in food. It is advisable to choose foods with immune function, cancer prevention and anti-cancer effects, such as white potatoes, soybean products, coix seeds, cauliflower, garlic, carrots, asparagus, tomatoes, figs, kiwi, gourd, radish, shiitake mushrooms, mushrooms, fungus, etc. In addition, consider their hobbies and the environment in which they eat. Eating their favorite food can increase the secretion of gastric juice, which can promote appetite and improve the absorption and utilization of food. The eating environment can also affect the patient’s appetite, so a pleasant eating environment should be created. In short, according to the principle of “three parts treatment and seven parts nourishment”, according to the specific situation of the patient, reasonable diet, strive to diversify, strengthen nutrition, and promote physical recovery.