Pitch　deviations　are　always　the　most　important　parameters　of　gear　accuracy　since　they　influence　the　performance　of　gear　transmissions　directly.　How　to　quickly　and　accurately　obtain　the　pitch　deviations　of　the　intermediate　precision　gears　is　the　key　problem　to　be　solved　urgently　in　automotive　gear　industry.　Conventional　pitch　deviation　measurement　method　has　the　deficiencies　of　low　measurement　efficiency　and　poor　repeatability.　In　the　proposed　new　method,　the　full　information　of　tooth　profile　deviation　curves　are　taken　as　the　evaluation　basis　of　pitch　deviation,　and　the　statistical　analysis　method　is　used　to　define　and　calculate　the　new　parameters　of　pitch　deviation,　which　overcomes　the　shortcoming　that　the　conventional　method　uses　small　sample　and　extreme　value　method　to　evaluate　the　pitch　deviation.　The　new　method　can　make　full　use　of　the　gear　measurement　data,　and　has　the　characteristics　of　evaluation　parameters　not　sensitive　to　the　random　errors,　good　repeat　measurement　result　consistency　and　close　correlation　between　the　evaluation　result　and　actual　performance　of　the　gear.　The　effects　of　the　new　method　were　verified　in　actual　measurement　experiments　on　the　rapid　inspection　machine　of　automotive　gears.　The　excellent　measurement　repeatability　is　achieved　even　when　the　tooth　pitch　measurement　speed　is　up　to　0.3　seconds　per　tooth　flank.　©　2016,　Science　Press.　All　right　reserved.