Lung cancer is a consumptive disease and it is very common for patients to have unbalanced nutrition, therefore, it is very important for them to improve their appetite and strengthen their nutrition. For the recovery of lung cancer patients, a good diet is very important. A good diet can effectively keep the patient’s body under normal condition and effectively inhibit the progress and metastasis of lung cancer. So, how should the diet of lung cancer patients be reasonably arranged? I. Balanced nutrition helps lung cancer treatment Early and middle stage lung cancer patients, whose digestive system function is sound, should seize the time to supplement the body with nutrition after clinical diagnosis in order to improve physical quality, enhance resistance and prevent or delay the emergence of cachexia. If the nutrients are adequately supplemented before clinical treatment, patients with better body condition can tolerate chemotherapy and radiotherapy better and have better treatment effect; similarly, patients with better body condition are more likely to receive surgery and recover faster than those with poorer nutritional condition. Therefore, early and middle stage lung cancer patients should supplement various nutrients, such as high quality protein, carbohydrates, fat, inorganic salt and multivitamins as soon as their digestion and absorption ability allows. Second, proper supplementation of specific ingredients to resist lung cancer Diet is one of the most important factors in lifestyle, and as it is often said, “three parts of medicine and seven parts of nourishment”, dietary conditioning is an important part of disease treatment. But at the same time, it is also a problem that is easily neglected. Since ancient times, China has used medicinal food to regulate the body and assist in prevention and treatment. Therefore, the history of food therapy in China can be said to have a long history. The role of food therapy is to use daily dietary requirements as health food for recovery, and also to prevent and treat diseases. The anti-cancer food is different from ordinary food, and different from simple Chinese medicine prescription, it is a special food that combines the functions of both in one. This combination of medicine and food makes it easy for patients to accept, and the medicinal power can be sustained, often achieving effects that cannot be obtained by simple medicine. Asparagus contains asparagin, asparagine, aspartic acid and various steroids, which have the function of preventing the spread of cancer cells and can be consumed appropriately; cauliflower and cabbage can improve the immunity of the body and fight against cancer cells, which is the priority choice for lung cancer patients; shiitake mushroom and fungus can not only improve immunity, but also nourish Yin and moisten lung, which are also the priority choices for lung cancer patients. Mushrooms and fungus not only improve immunity, but also nourish yin and moisten lung, which are also the priority choices for lung cancer patients. White radish and pear can also be eaten more often, as they can pass through the lung meridian and have the effect of relieving cough, resolving phlegm and calming asthma. Especially pear can reduce the dry cough caused by radiotherapy and chemotherapy, and is suitable for lung cancer patients: fungus, tomato, carrot, mushroom, peanut, lily, jellyfish, almond, lotus seed, pear, water chestnut, banana, milk, soybean, animal liver and so on. Avoid eating beef, mutton, scallop, chili, leek, garlic, etc. Third, lung cancer patients should avoid or forbid ingredients Avoid smoking and alcohol. Avoid spicy and stimulating food, such as pepper, chili, cinnamon, etc. Avoid hot foods such as fried and barbecued foods. Avoid greasy and sticky foods that produce phlegm. Avoid promoting cell proliferation ingredients, such as ginseng, etc. Avoid eating snapper in patients with yellow or white greasy tongue.