1. Prohibition and control of smoking: non-smoking and early cessation of smoking may be the most effective way to prevent lung cancer. Prohibition and control of smoking, first of all, should focus on reducing the proportion of smokers in the population, and certain laws or regulations need to be made to restrict people, especially to restrict teenagers from smoking. 2.Control air pollution: Do a good job in environmental protection and effectively control air pollution, so as to achieve the purpose of lung cancer prevention. 4.Prevent and control chronic bronchitis: Since the incidence of lung cancer in patients with chronic bronchitis is higher than that in those without chronic bronchitis, it is of certain significance to actively prevent and control chronic bronchitis to prevent lung cancer. In particular, smokers suffering from chronic bronchitis should be persuaded to quit smoking because the incidence of lung cancer is higher in those who suffer from chronic bronchitis and smoke. Early detection, early diagnosis and early treatment: The screening methods for early lung cancer are still unsatisfactory, and the cost of lung cancer screening in the population is very expensive, and the possibility of reducing lung cancer mortality is very small.