The dietary considerations for cancer patients are as follows: 1. Focus on light diet and make reasonable recipes according to patients’ own conditions. For example, for those with malnutrition and anemia, the diet should be rich in nutrition, with more intake of fish, chicken, eggs, milk and other foods; for those with excess nutrition, avoid intake of fatty meat, pancetta and other foods; 2. Moderate consumption of seafood and more fresh vegetables and fruits, such as oranges and grapefruit; for those with electrolyte disorders, such as those with low potassium, it is recommended to consume more bananas, oranges and other high potassium foods.