Abstract: Objective To analyze the diagnosis, treatment and medical identif cation of obstructive sleep apnea-hypopnea syndrome (OSAHS) in pilots． Methods The sleep status of 93 snoring pilots was analyzed by polysomnography． The pilots were divided into snoring group, mild OSAHS group and severe OSAHS group according to the diagnosis and treatment manual of OSAHS (2011 revised edition) by Sleep Apnea Disease Group, Chinese Society of Respiratory Disease, Chinese Medical Association． Their age and BMI were compared in different groups． Apnea-hypopnea index (AHI) were compared before and after treatment． Results Snoring, mild OSAHS and severe OSAHS pilots accounted for 35．5%, 28．0% and 23．7%, respectively, with the fghter pilots accounted for the highest percentage in all groups． The age was signif cantly younger in snoring group than in mild and sever OSAHS groups (P< 0．05)．The BMI was significantly lower in snoring group and mild OSAHS group than in sever OSAHS group (P< 0．01)． Eighteen pilots (52．9%) with moderate and sever, OSAHS underwent surgical or non-invasive continuous positive airway pressure (CPAP) treatment． Six severe OSAHS pilots were permanently grounded． The AHI was signif cantly lower after surgical operation or CPAP than before surgical operation or CPAP (P< 0．01)． The effect of CPAP was better than that of surgical operation (t=4．275, P=0．000)． Conclusion Polysomnography plays an important role in diagnosis of OSAHS in pilots． Both CPAP and surgical operation can improve OSAHS in pilots．