During and after the treatment of lung cancer patients, it is recommended to eat more of the following foods: i. Fresh fruits and vegetables: they are rich in many kinds of vitamins, which are beneficial to patients’ recovery. II. Foods with phlegm-clearing, heat-clearing and cough-suppressing effects: Lung cancer patients mostly have cough and phlegm-suppressing symptoms, so they can usually take more, such as licorice water, loquat and other foods with phlegm-clearing and cough-suppressing effects. Food with anti-tumor, corrective and blood-supplementing effects: such as barley, red dates, black beans, aconite, etc. 4. High-quality protein: Lung cancer patients often have poor physique and poor nutrition, so they can consume more high-quality protein, such as fish, chicken, shrimp, etc. In conclusion, lung cancer patients should consume different kinds of nutrient-rich foods according to their individual physique, symptoms and signs.