The mechanism of tinnitus remains undear.Currently,in addition to tinnitus induced by ear disea-ses,various systems of the body are also involved in the pathogenesis of tinnitus.Obstructive sleep apnea hypopnea syndrome(OSAHS)may be related to tinnitus,which has garnered increasing attention in recent years.This article reviews the latest research progress on the occurrence and possible mechanism of tinnitus in OSAHS,shedding new light on the treatment of tinnitus.