The diet of tumor patients should pay attention to supplementing high-quality protein and consuming fresh vegetables and fruits in moderation to replenish vitamins. Since tumor is a kind of consumptive disease, so tumor patients should consume some foods rich in high quality protein, such as chicken, fish and so on. Moderate consumption of fresh vegetables and fruits, such as celery, cabbage, carrot, kiwi, etc. can supplement vitamins and minerals for tumor patients, which is beneficial to them. As tumor patients are prone to malnutrition, it is recommended to have reasonable diet and proper exercise under the guidance of doctors or dietitians, and give parenteral intravenous nutrition therapy when necessary.