After chemotherapy, lung cancer patients are relatively weak, coupled with gastrointestinal dysfunction, reduced digestive ability and poor appetite. At this time, more attention should be paid to increase small, fine and soft, nutritious food in diet, and pay attention to eating less and more meals, for example, they can eat skinny meat porridge, old duck porridge, egg soup and mashed potatoes. Secondly, more high-protein and high-calorie foods should be added to the staple food with fine food to mobilize the patient’s appetite. It is recommended to eat more nutritious foods such as corn, black beans and black sesame, together with green fruits and vegetables rich in vitamin C and many minerals, such as cabbage, purple kale, cauliflower, apples and kiwi, etc. In addition, if lung cancer patients have anemia and declining white blood cells, they can add longan meat, black chicken, duck meat, turtle and jujube to their diet as appropriate to replenish qi and benefit blood and improve blood status.