How long can a patient live in the middle stage of lung cancer is mainly related to the type of lung cancer, differentiation, stage, patient’s individual condition, treatment and other factors, which should be analyzed on a case-by-case basis and cannot be generalized. In the middle stage of lung cancer, the cancer cells have not yet spread and metastasized extensively, and the patient may have cough, sputum, hemoptysis, chest tightness, chest pain and other symptoms. If patients can undergo radical surgery and post-operative comprehensive standardized treatment with radiotherapy, chemotherapy and targeted therapy, the 5-year survival rate of stage II patients is about 60%-80%, that of stage IIIA patients is about 30%-40% and that of stage IIIB is about 20%. However, if patients have poor physical and mental conditions and other underlying diseases, such as hypertension and diabetes, the specific survival time varies from person to person. It is recommended that patients with mid-stage lung cancer should prefer surgery. Generally, patients’ body basically recovers around 1 month after surgery, and adjuvant radiotherapy and other treatments can be considered. In terms of diet, patients need to be light and easy to digest, and can eat more vegetables, fruits and lean meat, etc.