Whether the daily diet is scientific and reasonable or not directly affects the treatment effect and prognosis of tumor patients. As we know, disease is not an uncaused consequence, environmental pollution, family heredity, carcinogenic substances in food, and the damage of the seven emotions and six desires are all causes of cancer, and the treatment also depends on the cooperation of many aspects. For example, many foods contain carcinogenic substances, such as high-temperature fried, barbecued, preserved and smoked foods, which are proved to contain carcinogenic substances, so tumor patients should never eat more of them and it is better not to eat them. Wu Xianwen, Department of Oncology, Xiyuan Hospital, Chinese Academy of Traditional Chinese Medicine It is not difficult for normal people to eat these anti-cancer foods, but it is somewhat difficult for tumor patients, especially during drug chemotherapy and radiotherapy, because their appetite is affected by their disease or negatively affected by the side effects during treatment, which greatly affects normal eating, in other words, they cannot eat anything at all. Therefore, when preparing daily food for tumor patients, they should have the following characteristics: 1. It is advisable to eat lightly, eat little and often, not to overeat, avoid spicy and irritating, fried, high sugar and high fat food, quit smoking and drinking, pay attention to diet matching, let the patient’s appetite open, otherwise it is useless to have no appetite at all even if the patient is rich in nutrition. 2. Eat more protein and amino acid foods, such as fish, lean meat, eggs and beans, because tumor itself is a kind of consuming disease, patients need protein and amino acid to maintain vitality and improve immunity. 3. Eat more foods rich in anti-cancer ingredients such as garlic, asparagus, mushrooms, carrots, etc.