Lung cancer is one of the most common malignant tumors, and the prevalence rate is male > female, with male:female ratio of 3-5:1. Such a high incidence of lung cancer has a great impact on the whole society. So how can we reduce the incidence of lung cancer? First of all, we should continue to increase our efforts in tobacco control in order to effectively reduce the incidence of lung cancer. This is the main reason why lung cancer is higher in men than in women; secondly, workers who are engaged in serious pollution or often exposed to physical and chemical carcinogens should always do a good job in protecting themselves; once again, experts remind that we should not forget to do more physical exercise to enhance our physical fitness and eat more fresh fruits and vegetables on a regular basis even if we are busy. At the same time, we should also pay attention to the early detection of lung cancer, especially we should pay high attention to the people with high incidence of lung cancer, including those who have a history of smoking, aged over 40, and if they have some symptoms such as cough and low fever, they should have regular checkups. At present, the earliest means of lung cancer screening is chest fluoroscopy, and nowadays, X-ray is commonly used, but in fact, it is easier to be detected by chest CT, which is done at least once a year. For some people who smoke more heavily or have obvious respiratory symptoms, it should even be done once every six months. These are also important tools to improve the cure rate of lung cancer and reduce the mortality rate of lung cancer.