Cancer patients can eat eel in moderation, but should pay attention to moderate diet, and at the same time pay attention to dietary diversity, to ensure balanced nutrition. Eel is rich in nutritional value, rich in protein as well as vitamin B1, vitamin B2, vitamin C, calcium, phosphorus, iron, potassium and other vitamins and minerals, which can replenish the nutrients needed by the human body and enhance the body’s resistance, so cancer patients can eat eel. But pay attention to the right amount, avoid overeating, cooking method should be light. In normal times, also pay attention to dietary diversity, eat more vegetables, fruits, eggs, beans, cereals, etc., to ensure balanced nutrition. Light and easy-to-digest food should be the main focus, and greasy and spicy food should be avoided. Meanwhile, cancer patients should actively cooperate with doctors to improve the quality of life and prolong the survival period.