In　order　to　design　a　large　deformation　of　flexure　hinge　with　high　precision　and　simple　structure　and　to　promote　the　motion　precision　of　parallel　platform　and　the　life　of　elements,　a　Y-type　flexure　hinge　was　proposed　in　the　article.　Firstly,　made　analysis　and　study　of　the　rotation　center,　installation　method　and　stroke　requirements　of　flexure　hinge　by　application　of　ANSYS　and　ADAMS.　Secondly,　processed　the　flexure　hinge　by　using　CNC　machine.　Thirdly,　measured　the　axis　drift　of　flexure　hinge　by　using　the　3D　optical　coordinate　measuring　instrument　OPTOTRAK.　Finally,　conducted　the　circle　trajectory　experiments　of　parallel　platform　with　kinematic　pairs,　leaf　spring　flexible　hinge　and　Y　type　flexible　hinge.　The　results　show　that　the　maximum　rotation　error　of　Y　type　flexure　hinge　is　0.596　2　mm　and　the　maximum　error　of　circle　trajectory　on　the　parallel　platform　provided　with　Y　type　flexible　hinge　decreased　by　42.7%　as　compared　with　on　the　parallel　platform　provided　with　kinematic　pairs,　which　means　Y　type　flexure　hinge　can　substitute　the　kinematic　pairs　in　the　parallel　platform　and　able　to　promote　the　motion　precision　of　the　parallel　platform.　©　2017,　Science　Press.　All　right　reserved.