On　the　basis　of　H-shaped　steel-RC　stepped　pile　model　tests,　the　quasi-static　tests　of　2　H-shaped　steel-RC　stepped　piles　(HS-RC-0.25,　HS-RC-0.50)　and　an　H-shaped　steel　(HS)　pile　under　the　low　cyclic　repeated　loading　were　carried　out.　A　horizontal　displacement　load　was　applied　on　the　pile　top,　and　the　strain　and　soil　pressure　gauges　were　embedded,　a　specially　designed　test　method　for　the　horizontal　displacement　of　the　pile　body　was　adopted,　and　the　failure　characteristics　of　the　HS-RC　stepped　pile,　the　horizontal　displacement　and　strain　of　the　pile　body　along　the　pile　depth,　skeleton　curve,　and　hysteretic　behavior　curve　were　obtained.　The　horizontal　displacement　abilities　of　the　stepped　pile　top　under　free　and　fixed　conditions　were　compared　and　analyzed　by　OpenSEES.　The　reduction　coefficient　and　conversion　coefficient　of　the　horizontal　bearing　capacity　of　the　stepped　pile　were　obtained,　and　the　calculated　value　obtained　by　the　reduction　coefficient　and　test　value　of　horizontal　bearing　capacity　of　the　model　pile　were　compared.　Test　results　show　that　the　elastic　deformation　range　of　the　pile　top　of　the　HS　pile　is　2-25　mm,　and　the　pile　has　strong　horizontal　deformation　ability,　positive　bearing　capacity,　full　hysteresis　loop　during　the　whole　loading　process,　and　excellent　energy　consumption　effect.　The　stiffness　ratio　has　no　significant　effect　on　the　failure　mode　of　the　stepped　pile.　The　upper　steel　pile　of　the　stepped　pile　has　no　apparent　buckling　failure,　and　the　concrete　at　the　variable　section　is　seriously　peeled　off　with　the　same　failure　position.　With　the　increase　in　the　stiffness　ratio,　the　yield　displacement　and　yield　load　of　the　stepped　pile-soil　system　increase.　Compared　with　that　of　HS-RC-0.50,　the　yield　displacement　of　HS-RC-0.25　decreases　by　29.15%,　and　the　strain　mutation　of　the　pile　body　decreases.　The　hysteresis　loop　of　the　stepped　pile　is　pinched　at　the　initial　loading　stage　due　to　slip　and　becomes　spindle-shaped　at　the　later　loading　stage.　The　energy　consumption　effect　is　positive,　and　the　energy　consumption　of　HS-RC-0.50　during　the　whole　loading　process　is　25.4%　more　than　that　of　HS-RC-0.25,　which　shows　an　excellent　horizontal　deformation　ability.　Compared　with　the　experimental　value,　the　calculation　error　of　HS-RC-0.25　is　-9.68%,　while　the　calculation　error　of　HS-RC-0.50　is　-2.47%.　The　HS-RC　stepped　pile　can　meet　the　horizontal　deformation　requirements　of　the　integral　abutment　bridge　pile　foundation,　and　the　reduction　coefficient　can　be　used　to　better　calculate　the　stepped　pile＇s　horizontal　bearing　capacity　characteristic　value.　©　2022　Chang＇an　University.　All　rights　reserved.