Immunotherapy patients should pay attention to diversified dietary structure, appropriate supplement dietary fiber, pay attention to appropriate increase protein intake. 1. Diversified dietary structure: For immunotherapy patients, it is recommended to pay attention to dietary diversification, a single diet will lead to a single source of intestinal micro-ecology, which leads to the diversity of the bacterial flora become less, so we need to diversify the diet, which can improve the micro-ecological environment of the human intestine, enhance the security of the immune system. 2. Supplementary dietary fiber: pay attention to the appropriate supplemental dietary fiber, pay attention to eat more fresh fruits, vegetables, beans and cereals, pay attention to ensure balanced nutrition, pay attention to coarse and fine mix. 3. Increase protein intake: pay attention to the appropriate increase in protein food intake, eat some high protein food, pay attention to low-fat diet, pay attention to choose some easy to digest, avoid eating some cold spicy food. During the immunotherapy period, it is recommended to choose a reasonable diet structure under the guidance of the doctor.