In　order　to　study　the　effect　of　mechanical　behavior　of　steel　H-pile　foundation　in　integral　abutment　jointless　bridges　(IAJBs)　by　unbalanced　earth　pressure　and　asymmetric　loading,　several　reciprocating　low-cycle　pseudo-static　tests　on　studying　the　soil-steel　H-pile　interaction　were　carried　out　under　symmetric　conditions　(both　balance　earth　pressure　and　symmetric　loading),　only　unbalance　earth　pressure　(symmetric　loading)　and　completely　asymmetric　conditions　(both　unbalance　earth　pressure　and　asymmetric　loading),　respectively.　A　comprehensively　comparative　study　was　performed　to　find　their　behaviors　in　terms　of　horizontal　deformations,　soil　resistance,　strain,　and　bending　moment　of　piles.　The　test　results　indicate　that　the　horizontal　deformation　of　positive　loading　is　significantly　different　from　that　of　negative　loading　under　completely　asymmetric　conditions.　In　addition,　the　soil　resistance　and　bending　moment　of　the　pile　are　significantly　larger　than　those　of　negative　loading　under　positive　loading.　The　unbalance　earth　pressure　and　asymmetric　loading　have　a　significant　impact　on　the　horizontal　deformations,　soil　resistance,　and　the　bending　moment　of　the　pile.　Among　them,　the　unbalance　earth　pressure　induces　the　overall　negative　accumulative　deformation　and　increases　the　soil　resistance　and　the　bending　moment　of　the　pile.　The　positive　asymmetric　loading　decreases　the　horizontal　deformation　but　increases　the　soil　resistance　and　bending　moment　of　the　pile.　The　negative　asymmetric　loading　decreases　the　horizontal　deformation,　soil　resistance　and　bending　moment　of　the　pile.　©　2022,　Editorial　Department　of　Journal　of　Hunan　University.　All　right　reserved.