There is no definite best food for tumor patients, the important thing is to ensure sufficient and comprehensive nutrition, enhance immunity, and at the same time follow the principle of low fat, high protein and easy digestion. Tumor cells have stronger protein synthesis and decomposition ability than normal cells, which can easily put the body in a state of severe consumption. Therefore, tumor patients should eat high protein foods, such as milk, lean meat, fish and so on. Adequate protein intake should be guaranteed to maintain the normal operation of the organism. Tumor patients also need to eat more fresh fruits and vegetables to supplement vitamins and ensure balanced nutrition, such as spinach, tomatoes, apples, bananas and so on. Tumor patients’ daily diet should follow the principles of low fat, high protein and easy digestion, avoiding high-fat diet, while maintaining healthy living habits and mentality. Tumor patients should eat reasonably according to their specific conditions, under the guidance of professional physicians, eat less and more meals, and take supplements scientifically.