Chemotherapy alone cannot cure lung cancer. Chemotherapy mainly uses chemotherapeutic drugs for the whole body, which helps to kill tumor cells and has certain therapeutic effect on lung cancer, but it is not the first choice of treatment for lung cancer, and it can not be cured by chemotherapy alone, but can only control the development of the disease. Once lung cancer is diagnosed, the first choice of treatment is surgery. Generally speaking, after radical surgery for early stage lung cancer, further chemotherapy can kill residual tumor cells and the cure rate is relatively high. If lung cancer develops into advanced stage, distant metastasis and proliferation often occur, so it is impossible to take surgical treatment. Chemotherapy, together with radiotherapy and other methods, is not able to cure the disease, but can control the development of the disease. Once lung cancer is diagnosed, one should actively cooperate with doctors to take treatment and go to hospital for regular review.