Objective: To analyse DSA guided by the different cause of the failure of the airway stents,and wish to reduce the repeated operation of the pain of patients,reduce the serious complications,reduce the mortality rate; Methods: The analysis summary I branch since January 2007-May 2015 in 125 cases of airway stents,one-time in 96 cases of success,secondary in 24 cases of success,failure,4 cases of intraoperative death in 1 case.