High　damping　seismic　islolaton　rubber　bearings　(HDRBS)　as　a　new　kind　of　isolation　rubber　with　the　good　performance　of　consuming　energy　have　been　used　in　bridge　seismic　isolation　control　recently.　In　order　to　study　the　hysterertic　behavior　of　this　new　kind　of　isolation　rubber,　high　damping　seismic　islolaton　rubber　bearings　used　in　a　highway　bridge　were　taken　as　objects　in　vertical　compression　and　horizontal　shear　loading　tests.　The　effects　of　vertical　stress,　horizontal　ultimate　shear　strain,　loading　frequency　and　loading　times　on　hysteretic　properties　were　investigated.　The　results　show　that　the　hysteretic　curve　of　HDRBS　is　rather　plump,　describing　good　energy　comsuming　character　and　after　repeated　cyclic　loading　the　performance　of　consuming　energy　does　not　appear　decreasing　trend.　In　addition　loading　frequency　has　some　effect　on　the　equivalent　bearing　stiffness　and　equivalent　damping　ratio.　©,　2015,　Chinese　Vibration　Engineering　Society.　All　right　reserved.