When a patient suffers from tumor, the patient and his family are in a nervous state, and they are overwhelmed in every aspect; especially in the aspect of diet, it is more prominent, or the doctor says, or the patient passes, or the network says “what to eat or what not to eat”, etc. It is difficult to choose. In fact, the diet for tumor patients should not be very complicated. It is enough to do the following 2 points. 1.Eating habits (including living habits) are one of the reasons for tumor occurrence, so it is necessary to adjust them. 2. Proper adjustment. If you are over 40 years old, you have already formed a certain dietary pattern, that is to say, your body has formed a “certain balance of diet”. When this “diet balance” is out of balance, you will easily suffer from diseases (tumor is just one of the diseases). Therefore, it is necessary to adjust that “imbalance”. In simple terms, it means that “the dietary habits should remain unchanged, but the excesses should be corrected”. To correct the “excessive diet”, we should reduce what we like to eat more and add what we don’t like to eat properly. In addition, different ethnic groups, different species, the requirements of the diet is different. In terms of the Han Chinese, the vast majority of them are the descendants of the farming people, and the genetics of our diet determines our dietary principles: food is the mainstay, vegetables (including fruits) are supplementary, and less meat.