The prognosis of stage 1A lung adenocarcinoma is better, and the five-year survival rate can reach more than 90%. Stage 1A lung adenocarcinoma, according to the international TNM staging standard, means that the patient’s tumor volume is less than 1cm, no obstructive pulmonary atelectasis, pneumonia and so on, and no metastasis to lymphatic and distal organs, so the prognosis of the patient belongs to the early stage, and the five-year survival rate of the patient with active treatment can reach 90%. After the discovery of stage 1A lung adenocarcinoma, it is necessary to take radical surgery to remove the lesion in time, and generally there is no need to carry out radiotherapy and chemotherapy after the surgery to get cured; if there is a high risk of recurrence and metastasis after the surgery, it is necessary to carry out radiotherapy and chemotherapy for a period of time to get cured.