In early stage lung cancer in situ, the tumor size is small and confined to the surface of the airway mucosa, and has not yet broken through the basement membrane, so radical treatment can be achieved through surgery. Early in situ lung cancer, where the cancer cells have not yet metastasized to lymph nodes or bloodstream, is the best time for radical surgery. Currently, the most common method is to use minimally invasive surgery with thoracoscopy to do local airway resection through an opening in the armpit, and after the surgery, it is necessary to do pathological examination on the tumor tissues to clarify the nature of the cancer cells. The surgery has the characteristics of small incision, fast recovery, less scar and hidden, and most importantly, it can achieve the effect of radical treatment, and there is no need for chemotherapy or radiotherapy after the surgery. Early detection of lung cancer can achieve good therapeutic effect, and it is recommended to check the chest CT regularly, as early in-situ lung cancer can be cured by the surgery, and it is necessary to strengthen the nutrition after the surgery, and have regular recheckups, and it is important not to be negligent, so as to avoid the condition being miscarried out.