Lung adenocarcinoma stage III usually cannot be cured, and blood line metastasis will occur during this period, but the disease can be controlled to a certain extent through corresponding methods. Stage III lung adenocarcinoma means that the tumor has metastasized to local lymph nodes through lymph nodes, and may also metastasize to ipsilateral parabronchial, ipsilateral hilar lymph nodes and ipsilateral submediastinal lymph nodes, ipsilateral or contralateral diagonal or supraclavicular lymph nodes, but there is no metastasis to distant organs. Usually, surgery, radiotherapy and comprehensive treatment methods such as chemotherapy and immunotherapy can be used to control the disease and kill the cancer cells. The possibility of cure for stage III lung adenocarcinoma is relatively small, but the above methods can control the condition to a certain extent. Patients with stage III lung adenocarcinoma should go to hospital for review in time and actively cooperate with doctor’s treatment.