How long can lymph node metastasis of lung cancer live depends on the typology of lung cancer and the location of metastasis, which should be analyzed on a specific basis and should not be generalized. Lymph node metastasis is a common metastatic route of lung cancer and an important indicator to assess the survival rate of lung cancer. The survival period after lymph node metastasis of lung cancer should be evaluated by various factors. If lymph node metastasis occurs in the ipsilateral hilum and mediastinum, after surgical removal and chemotherapy treatment, the 5-year survival rate of patients can be about 40%. If metastasis occurs in the contralateral mediastinum or supraclavicular lymph nodes, the 5-year survival rate can be about 30% after radiotherapy chemotherapy and targeted therapy. If distant lymph node metastasis occurs, the survival rate is relatively low, and the exact time varies from person to person. After lymphatic metastases are detected, patients are advised to undergo surgery and chemotherapy in a timely manner to minimize the occurrence of distant metastases in order to prolong the survival period.