With the development and progress of technology in society, the medical level is getting higher and higher, and the cure rate of many diseases is increasing year by year, such as lung cancer. However, many patients do not pay much attention to their health, which leads to recurrence of the disease. The general principle of diet after lung cancer surgery should be light, soft and easy to digest and absorb. The postoperative diet of lung cancer should also pay attention to the balance of various nutrients to facilitate the recovery of the postoperative organism. We should pay attention to eating more fresh vegetables and fruits, such as green, yellow and red vegetables, as well as black fungus, almond dew, water chestnut, asparagus, lemon, red dates, garlic, etc., because fruits and vegetables are rich in vitamin C, which is a cancer inhibiting substance and can block the generation of cancer cells; we can use foods that can enhance the immunity of the body and help drugs inhibit the effect of cancer cells, such as snapper, yellow fish, sweet almonds, walnuts, dates, shiitake mushrooms, etc.; according to their According to the different symptom expressions, foods with the effect of relieving cough, reducing fever, stopping bleeding, relieving gas, broadening chest and relieving pain can be used in a targeted manner to reduce pain and enhance confidence in treatment; not to eat or eat less stimulating foods, including fried foods; avoid eating shrimps, crabs and other foods that can easily cause allergy; not to smoke and not to drink alcohol. Not to emphasize the avoidance of food. As the nutritional status of patients is poor and the immune function is low, which is not conducive to the recovery of patients’ body, therefore, tumor patients should not over-emphasize the avoidance of food. The recurrence and metastasis of tumor patients are not related to whether to avoid eating or not. As long as they want to eat, they can eat and just eat comfortably.