In　the　area　of　gear　integrated　error　technology　of　gear　measurement,　the　problem　that　existing　difference　between　the　results　of　gear　integrated　error　measurement　and　the　single　parameter　measurement　has　not　been　solved　well.　By　analyzing　the　phenomena　of　different　point　contact　in　gear　integrated　error　measurement,　the　definition　and　calculation　method　of　different　point　contact　error,　and　the　error　correction　method　based　on　quasi-morphological　filtering　is　proposed.　The　inherent　difference　between　the　errors　resulted　from　different　point　contact　and　curvature　interference　are　identified.　Simulations　of　different　point　contact　error　correction　and　experiments　of　different　point　contact　error　correction　for　actual　measured　data　are　conducted.　Theoretical　analysis　and　experimental　data　show　that　the　measurement　result　after　correction　are　closer　to　the　true　shape　of　the　actual　measured　tooth　profile,　the　application　of　this　method　of　error　correction　has　significant　effect　and　can　improve　the　measurement　accuracy　of　the　gear　instruments　which　based　on　integrated　error　technology.　©　2017　Journal　of　Mechanical　Engineering.