The　steel　shell-concrete　arch　pylon　is　subjected　to　complex　forces,　which　resulted　in　many　problems　such　as　excessive　deformation　and　stresses　during　construction　process.　In　order　to　ensure　the　internal　force　state　and　the　geometry　state　of　steel　shell-concrete　arch　pylon,　the　stresses　and　deformation　of　arch　pylon　under　construction　and　its　support　system　are　investigated　by　different　finite　element　models.　The　analysis　results　show　that　the　arc　axis　of　pylon　has　a　great　influence　on　structural　behaviour　of　pylon　column;　the　construction　process　of　arch　pylon　should　not　be　ignored　for　simulation;　the　deformation　of　arch　pylon　column　and　the　tensile　stress　of　concrete　infill　are　very　sensitive　to　wind　pressure.