The 5-year survival rate of lung cancer refers to the percentage of lung cancer patients who can survive for 5 years or even longer. If there is no recurrence or metastasis in 5 years after lung cancer surgery, the chance of recurrence and metastasis in the future is usually smaller, and in clinical practice, it can be considered as a cure. However, if lung cancer is not surgically removed, the 5-year survival rate is very low, especially for small cell lung cancer, there is almost no lung cancer that can survive for 5 years without surgical removal. At present, some patients with lung cancer may survive for 5 years if their genetic test shows mutations and they are suitable for oral targeted drug therapy.