Abstract: Objective:To compare the effects of two kinds of anesthesia on bronchoscopy.Methods:One hundred and twenty patients were randomly divided into group A(60 cases),which were used by ultrasound inhalation method,and group B(60 cases),which were used by throat spray.The oxygen saturation,pulse,heart rate,respiratory rate,cough and adverse reaction rates of memory of two groups were observed before examination and in process of examination and the reexamination rates were investigated after examination.Results:The oxygen saturation of group B was significantly lower than that of group A,while its heart and respiratory rates were significantly higher than that of group A(P0.01).The cough,bad memory and the average consumption amount of drugs of group A were less than that of group B,while its anesthesia effects and reexamination rates were higher than that of group B(P0.01).Conclusions:The ultrasonic atomization surface anesthesia is of good efficacy,short time to achieve effective anesthesia,less medication,less pain of the patient and less interference of the operator,which can ensure the smooth progress of bronchoscopy and be widely used in clinical.