Cancer patients are highly consumptive diseases, but at the same time it is important to pay attention to the diet and avoid using diets that are not good for health or harmful to the body. For example, drinking alcohol and smoking are forbidden. It is also recommended to eat a light diet, do not eat spicy stimulation or smoky barbecue and pickled food more. These are not good for the gastrointestinal digestive function, especially like gastrointestinal malignant tumors, the causative factor itself may be related to these bad eating habits. Of course, cancer patients also need to properly supplement high-quality protein diet, such as fish, eggs, protein powder and so on are very good, can enhance the body resistance, assist anti-tumor treatment. Cancer is a chronic disease, dietary modification is very important.