For　high　and　long　span　of　fastener-style　steel　pipe　formwork　supports,　it　is　not　sufficient　to　ensure　it＇s　stability　and　safety　by　only　analyzing　the　stability　of　single　standing　poles　and　just　taking　necessary　construction　measures.　The　stability　analysis　for　the　whole　fastener-style　steel　pipe　formwork　supports　is　required.　Sampling　inspections　of　the　tightening　torques　of　steel　fasteners　of　four　construction　projects　were　made.　The　measurements　show　that　the　fastening　torques　of　more　than　eighty　percents　of　the　inspected　samples　can　not　meet　the　requirement　of　the　current　design　specification　in　China,　where　the　specified　value　of　the　fastening　torque　should　be　within　the　range　from　40　Nm　to　65　Nm.　Moreover,　the　average　value　of　the　fastening　torques　of　the　samples　is　less　than　20　Nm.　The　suitable　consideration　on　the　connection　performance　of　the　fasteners　is　critical　for　the　analysis　of　the　stability　of　the　whole　fastener-style　steel　pipe　formwork　supports　system.　Therefore,　experimental　studies　on　the　slip　resistant　performance　of　fastener　joints　were　conducted　with　the　consideration　of　the　major　factors　such　as　fastening　torques　and　the　type　of　fasteners.　Based　on　the　tests,　the　effects　of　the　factors　on　the　slip　performance　were　analyzed.　By　comparing　the　test　results　with　the　values　in　the　current　specification,　it　is　clear　that　the　fastening　torque　values　and　the　effect　of　the　type　of　the　fasteners　should　be　ascertained　case　by　case.　The　findings　from　this　study　can　provide　useful　information　for　the　analysis　and　design　of　the　high　and　long　span　of　fastener-style　steel　pipe　formwork　supports　in　practice.