With　the　continuous　improvement　of　the　theory　and　method　of　gear　measurement,　the　effectiveness　of　gear　contact　measurement　is　reduced,　making　it　difficult　to　meet　the　need　for　100%　gear　detection.　To　improve　the　measurement　efficiency　and　make　effective　use　of　the　full　tooth　surface　data,　a　gear　pitch　rapid　measurement　method　by　point　laser　sensor　is　proposed.　This　method　studies　the　principle　of　measuring　the　gear　based　on　a　laser　point　sensor,　and　the　efficient　model　of　collection　and　analysis　of　tooth　surface　data　is　established.　Then　the　evaluation　of　the　pitch　deviation　is　completed,　including　the　individual　single　pitch　deviation,　the　single　pitch　deviation,　the　individual　cumulative　pitch　deviation,　and　the　total　cumulative　pitch　deviation.　Additionally,　the　pitch　deviation　of　the　multiple　cross-sections　is　investigated,　which　may　characterize　the　overall　pitch　deviation　of　the　tooth　surface.　Compared　to　the　gear　measuring　center　P26,　the　experimental　results　show　that　the　optical　measurement　of　pitch　deviation　is　feasible　and　efficient.　Depending　on　the　different　measuring　conditions,　the　offset　status　of　the　sensor　can　be　selected　to　meet　the　different　efficiency　and　accuracy　requirements.　The　research　and　application　potential　of　a　point　laser　sensor　in　gear　measurement　is　wide-ranging.　©　2022　Society　of　Photo-Optical　Instrumentation　Engineers　(SPIE).