In recent years, the incidence and detection rate of lung cancer have gradually increased, and segmentectomy has been increasingly used to treat early non-small cell lung cancer. Some scholars believe that segmentectomy is more conducive to the preservation of postoperative lung function than lobectomy. Some studies have found that the two surgical methods have little difference in postoperative cost retention. This article deals with segmentectomy and lobectomy. A review of related studies on postoperative pulmonary function changes. .