Objective To investigate the effects of nasogastric tube（NGT） indwelling on postoperative pulmonary complications（PPCs） and prognosis in patients with cardiovascular surgery,in order to reduce PPCs and improve the patients’ prognoses. Methods Retrospective data of patients undergoing cardiovascular surgery in a tertiary hospital in Wuhan from July 2018 to November 2019 was conducted. The baseline data of patients in 2 groups were matched using a propensity score analysis. Results 316 patients were successfully matched,with 158 patients in the nasogastric tube indwelling group and 158 patients in the non-indwelling group. Compared with the patients in the NGT group without indwelling,the incidence of pulmonary infection,atelectasis,pneumothorax and respiratory failure was higher in the NGT group;the length of stay in the hospital and the length of stay in ICU were longer;the outcome was poor,with statistically significant differences（P<0.05）. Conclusion NGT indwelling is associated with the occurrence of pulmonary complications in patients with cardiovascular surgery,and it might prolong the length of stay and affect patient’s outcome.