A　three-dimensional　structural　model　of　a　integral　skewed　bridge　was　established　by　using　finite　element　analysis　software　SAP2000,　and　the　interactions　of　abutment-soil　behind　the　abutment　and　H-shaped　steel　pile-soil　around　the　pile　were　simulated　through　a　discrete　nonlinear　spring　element.　Through　nonlinear　time-history　analysis　under　a　series　of　bi-directional　seismic　actions,　the　influence　rules　of　pile　orientation,　stiffness　of　the　soil　around　the　pile,　and　rotational　stiffness　of　pile　head　on　the　seismic　responses　of　the　H-shaped　steel　pile　in　the　skewed　integral　abutment　bridge　were　studied.　Research　results　show　that　under　bi-directional　seismic　actions,　the　transverse　displacement　of　the　H-shaped　steel　pile　is　significantly　greater　than　the　longitudinal　displacement,　and　greatly　affected　by　the　pile　orientation.　The　bending　moments　around　the　strong　and　weak　axes　distribute　in　both　positive　and　negative　directions.　The　maximum　values　of　yield　surface　function　are　generally　located　at　the　pile　top,　while　the　other　peak　values　are　located　at　the　2-4　m　where　the　pile　body　is　buried.　When　the　steel　pile　is　arranged　around　strong　axis　bending,　the　longitudinal　displacement　at　the　pile　top　reduces　by　18.2%　compared　with　that　around　weak　axis　bending,　but　the　transverse　displacement　increases　by　47.7%.　The　bending　moment　around　the　strong　axis　at　the　pile　top　increases　by　about　3.9　times,　while　the　bending　moment　peak　value　of　reverse　strong　axis　of　the　pile　body　decreases　by　about　67.0%.　The　bending　moment　around　the　weak　axis　at　the　pile　top　basically　unchanges,　while　the　bending　moment　peak　value　around　the　reverse　weak　axis　of　the　pile　body　increases　by　about　1.0　times.　With　the　decrease　in　the　stiffness　of　the　soil　around　the　pile,　the　longitudinal　and　transverse　displacements　at　the　pile　top　improve,　and　the　yield　surface　function　value　at　the　pile　top　reduces　slightly,　while　the　peak　value　of　the　yield　surface　function　of　the　pile　body　increases.　The　pile　body　is　difficult　to　be　elastic.　When　a　flexible　connection　is　adopted　at　the　pile　head,　the　longitudinal　and　transverse　displacements　at　the　pile　top　both　rise.　The　yield　surface　function　value　at　the　pile　top　decreases,　and　the　pile　head　can　be　protected　effectively,　but　the　peak　value　of　the　yield　surface　function　of　the　pile　body　increases.　When　the　rotational　stiffness　of　the　pile　head　is　too　low,　the　peak　value　of　the　yield　surface　function　of　the　pile　body　may　be　higher　than　the　value　at　the　pile　top,　and　thus　the　pile　body　may　enter　the　plastic　stage　first　under　rare　earthquakes.　tabs,figs,refs.　©　2022　Chang＇an　University.　All　rights　reserved.