Lung cancer in early stage can affect life expectancy, most patients lung cancer originates from bronchial mucosa or glands, which seriously affects and endangers people’s health and life, and is a highly prevalent tumor and the main cause of cancer-related death worldwide. The most effective treatment for early stage lung cancer is surgery. The 5-year survival rate after surgery is over 70% for stage 1a patients, over 60% for stage 1b, about 50% for stage 2a patients and 30%-40% for stage 2b patients after surgery and postoperative adjuvant chemotherapy.