Stage 1A2 of left lower lung squamous carcinoma has a high success rate of cure, and the 5-year survival rate after surgery is above 70%.5-year survival rate refers to the percentage of patients who survive for more than 5 years after the tumor has undergone various comprehensive treatments. Lung squamous carcinoma belongs to a common type of lung cancer. According to the spreading degree of cancer cells, lung squamous carcinoma can be divided into 5 stages, 0-IV, and meanwhile into two periods, A and B. Period A is the early stage and period B is the late stage. And stage 1A2 squamous lung cancer belongs to the early stage of squamous lung cancer, in this period, the tumor is relatively small. Stage 1A2 squamous lung cancer is primary, the lesion is limited, has not invaded the surrounding tissues and has not metastasized. The smaller the tumor and the earlier the stage of squamous lung cancer, the higher the curative rate and the better the prognosis. Surgery is the first choice of treatment in this period. The prerequisite for achieving a high cure rate is also surgical treatment. Surgical removal of the lesion can achieve the goal of eradication. It should be noted that after the surgery, patients must set their mind right, maintain good dietary and living habits, and undergo regular checkups to detect recurrence and metastasis in time and carry out treatment in time. The key to cure squamous carcinoma of the left lower lung lies in whether patients follow the doctor’s instructions, carry out standardized treatment and pay attention to healthy lifestyle. Early detection, early treatment and keeping a good mindset.