The treatment of lung cancer is based on the first choice of surgical resection to reduce tumor load, postoperative chemotherapy to control microscopic lesions, combined with radiotherapy to control local tumor cells and reduce the rate of recurrence and metastasis. stage IA 5-year survival rate is 70-80%, stage IB 5-year survival rate is 50-60%. stage II 40-55%. Early stage cancer is better treated and has a higher cure rate. Long-term smokers, especially those who smoke 20 cigarettes per day and for more than 20 years. Clinically, lung cancer is a common malignant tumor of the respiratory system. The exact cause of the disease is not yet clear, but it is related to smoking, air pollution and occupational environment, etc. Typical symptoms are coughing and coughing with blood in sputum. After diagnosis, surgery should be preferred, and the chance of cure is relatively higher for those with earlier stages. People who are engaged in occupations related to toxic substances, such as work related to asbestos, arsenic, chrome, nickel and other toxic gases. People with family history of lung cancer. People with low immune function and long-term use of immunosuppressants need to undergo regular related tumor screening. Regular visits to the hospital for low-dose spiral CT of the chest are recommended.