At present, the intake of substances is generally not a problem, that is, the problem of eating can be completely solved, but any correct diet for tumor patients is still a problem that patients and their families repeatedly consult. It is clear that the meaning of tonic is not to rely on sea cucumber, abalone, shark fin and other rare things, as long as there is appetite, the three major substances in nature, fat, starch and sugar, are the best tonic. There is a category of tumors that need to control weight after surgery and other treatments to take less high-energy food, such as: breast cancer, ovarian cancer, colorectal cancer, etc. It is good for the control of tumors. In case of digestive tract, such as liver cancer, pancreatic cancer, gallbladder cancer, stomach cancer, food should be taken with less food and more meals, with easily digestible food as the main food. During radiotherapy, the digestive function is affected and easily digestible food is the most important. Patients after laparotomy should eat less crude fiber, which can easily produce abdominal pain or even obstruction. Older patients must let patients take easily digestible food, the amount of its own diet needs not much, because their own consumption reduced metabolism slower, as long as the usual amount of food can be maintained or appropriate less does not matter, do not get sick to the amount of diet to think that care for the patient, the clinical common eating patients vomiting, eating patients diarrhea, eating patients burping and other phenomena must be avoided. It is good for tumor patients to avoid eating and pay attention to the diet with each other.