〔Abstract〕 Objective To investigate the effect of active circulatory breathing technology (ACBT) on rapid rehabilitation of lung function after thoracoscopic resection of lung cancer. Methods 107 patients with stage Ⅰ~ Ⅲ a non-small cell lung cancer diagnosed in the Central Hospital of Panyu District Guangzhou City from January 2018 to March 2020 were randomly divided into the observation group (n = 54) and the control group (n = 53) . The patients in both groups were received thoracoscopic lobectomy, the observation group were received ACBT after operation, and the control group were received routine lung rehabilitation therapy after operation. The changes in pulmonary function〔forced expiratory volume in one second(FEV1),forced vital capacity(FVC),maximal voluntary ventilation(MVV)〕, degree of pain〔Visual analogue scale (VAS) score 〕and modified British Society for medical research dyspnea index (mMRC) score of the two groups were compared on the second day and two weeks after operation. Results Compared with the second day after operation, the pulmonary function (FEV1, FVC and MVV) of the two groups increased significantly at 2 weeks after operation, VAS score and MMRC score of the two groups decreased significantly at 2 weeks after operation,and the absolute values of change in FEV1 ,FVC,VAS score and mMRC scorein the observation group were greater significantly than those in the control group (P < 0.05). ConclusionCompared with postoperative routine lung rehabilitation therapy, ACBT can more effectively improve lung function after thoracoscopic resection of lung cancer, recover quickly, reduce postoperative pain, and improve quality of life.