Objective To explore the effect of bronchofibroscope joint mechanical ventilation on the treatment of the geratie surgery postoperative patients with acute respiratory failure.Methods 62 geratic surgery postoperagedative patients with acute respiratory failure were randomly divided into two groups(control group and treatment group).The treatment group(n=32) applyed bronchofibroscope aspiration and/or bronchial lavage joint mechanical ventilation.The control group(n=30) were treated only with mechanical ventilation.Compare with two groups parameters of arterial blood gas,the time of mechanical ventilation,average in ICU,success rate one time pull out windpipe conduit and case fatality rate.Results Compare with the control group,the treatment group patients parameters of arterial blood gas had been improved significantly;the time of mechanical ventilation and average in ICU had been cut short significantly;all showed a statistical difference(P<0.05).Success rate one time pull out windpipe conduit and case fatality rate were better than the control group,but there were no significant difference(P>0.05).Conclusion The effect of bronchofibroscope joint mechanical ventilation to treat the geratic surgery postoperative patients with acute respiratory failure was better than only mechanical ventilation,which can decrease the time of mechanical ventilation and average in ICU.The method was worth to spread.