The diet of cancer patients has always been a topic of concern. In terms of diet, we should mainly pay attention to three aspects: First, do not force patients to take blind supplements. For tumor patients, we can provide delicious, easy to digest and favorite food for patients, which is more effective. Secondly, the main focus is on lightness, but do not deliberately forbid spicy food. The intake of green vegetables and coarse fiber food is very important, and spicy food can be controlled appropriately, so there is no need to forbid it. Thirdly, to reduce the burden of stomach and intestines, tumor patients generally have to go through a long process of radiotherapy and chemotherapy, which is more physically exhausting and mentally stressful, so the diet at this time must pay attention to reduce the burden of stomach and intestines. The most taboo thing is to take a big fish and meat tonic, which not only can’t be absorbed, but also can easily increase the burden of the gastrointestinal tract and reduce the absorption efficiency of nutrition.