How long lung cancer lymph node metastasis stage III can survive is related to postoperative care, physical condition and metastasis, which need to be analyzed and judged according to specific personal situation. 21 years of statistics show that 1-year survival rate, 5-year survival rate and 10-year survival rate are 40.17%, 12.22% and 8.49% respectively, which can roughly judge the prognosis of the patients, and also guide the treatment of the patients. 1. Post-operative care: Post-operative care can help patients recover, and dietary planning and proper exercise planning can help prolong patients’ life. 2. Self condition: the older the patient is, the worse the prognosis is; patients with underlying disease have a worse prognosis than those without underlying disease; patients with good physical condition before surgery can help patients recover quickly. 3. Metastasis: if metastasis to brain, liver and other organs with important functions, patients may have lower survival time due to corresponding complications. How long lung cancer lymph node metastasis stage III can survive needs to be judged according to each patient’s own situation, so don’t be discouraged and take active treatment to avoid delaying the condition.