The effect of radiotherapy for lung adenocarcinoma is quite good. The local tumor control of single course chemotherapy is poor, and the effect of cure (less than 10%) is still unsatisfactory although high-dose radiotherapy can improve the local tumor control rate, but the synchronous radiotherapy can play a synergistic role and prolong the overall survival of patients well, and radiotherapy still occupies an important position in advanced lung cancer. Combination radiotherapy is a combination of induction chemotherapy, chemotherapy, synchronized radiotherapy, and consolidation chemotherapy, and is the standard treatment for advanced lung adenocarcinoma. A large phase III clinical study further confirmed that those who received concurrent radiotherapy achieved a longer overall generation period (OS) of 17 months versus 14.6 months compared to sequential therapy, and given this survival advantage, concurrent radiotherapy has been considered the standard of care for locally advanced lung adenocarcinoma in those who are in good general condition.