The necessary conditions for lung tumor resection surgery are: the clinical diagnosis has been largely confirmed, the lung tumor is benign or early malignant tumor, the patient does not have serious heart disease or poor lung function and other complications, the patient’s coagulation function and other indexes are normal, and the informed consent of the patient has been obtained, and so on. 1. It has been clarified before lung tumor surgery that the lung is a tumor lesion rather than an inflammatory nodule. 2. It is clear before surgery that the tumor is benign, or early malignant lung tumor, which belongs to the indication range of resection surgery. 3. Pre-operative assessment of the patient’s lack of serious heart disease, or lung disease and other contraindications to surgery. 4. Preoperative examination of the patient’s coagulation function, blood routine, liver and kidney function and other indicators are generally normal. 5. The necessity of surgical resection and the possible side effects have been informed to the patient before the operation, and informed consent has been obtained from the patient.