ObjectiveTo evaluate the clinical value of  bronchoscopy for children with postcardiothoracic operation atelectasis.MethodsTwentyfour children who were diagnosed as postcardiothoracic operation atelectasis received suction, lavage and local injection through bronchoscope.ResultsAfter treatment through bronchoscope, 14 cases (58.33%) recovered, 9 (37.50%) improved, and 1(4.17%) didn’t recover, the percentage of atelectasis improvement was up to 95.83% .ConclusionTreatment through bronchoscope is safe and effective for postcardiothoracic operation atelectasis in children.