Lung cancer, a disease that is increasingly alarming to talk about, has become the number one cancer worldwide in terms of incidence, and slightly late detection and poor treatment. Therefore, the mortality rate is listed in the top globally. So is it scary? Can normal people detect it in time, and can it be treated in time? What is the effect? In fact, the International Union Against Cancer (UICC) has recently formulated a formal treatment plan for lung cancer in 2009, and different treatment plans have been formulated for lung cancer at different stages of detection. Early stage lung cancer, without lymph node metastasis and distant metastasis, has good treatment effect and there is no need to be afraid. For example, small cell lung cancer is the fastest metastasis and treatment is based on chemotherapy, while squamous and adenocarcinoma are non-small cell lung cancer and surgery is preferred. Together with the combination therapy, radiotherapy and immunotherapy, they play a synergistic role in the treatment of lung cancer. Formal surgery is the key step in lung cancer treatment, if it can be surgically removed and systematically clear regional lymph nodes, to meet international standards, regardless of the post-surgical outcome, surgery is surgery, solving local problems, giving a good foundation for systemic treatment and prolonging the survival of many patients.