When lung alveolar invasive adenocarcinoma 8mm does not have metastasis, it should be treated with surgical resection as early as possible, and then different measures should be taken according to the stage and other specific conditions. Lung alveolar infiltrative lung cancer 8mm, purely in terms of tumor size is relatively small, according to the examination of the imaging results to determine whether there is the presence of proximal metastasis or distant metastasis, no lymph node and distant metastasis can be minimally invasive surgical resection of the local lesion tissue and part of the lung lobes, lymphatic dissection, the cure rate can be up to more than 90%. To determine the clinical stage of invasive lung adenocarcinoma, stage 2 and part of stage 3a patients can be treated with radical surgery, and for incompletely resectable stage 3a and stage 3B patients can be treated with radiotherapy or chemotherapy after surgery. For stage 4 patients, genetic testing can be performed to determine whether to take oral targeted drug therapy. For patients with pulmonary alveolar invasive carcinoma, it is recommended to consult the Department of Thoracic Surgery of regular hospitals.