The　seismic　responses　of　two　adjacent　buildings　linked　by　high　efficient　damper　for　multi　-　structure　system　(HEDMS)　are　investigated　in　this　paper　based　on　the　shaking　table　tests.　Experimental　observations　and　analytical　results　confirmed　that　the　HEDMS　could　effectively　reduce　the　seismic　responses　of　both　sub　-　structures.　And　the　investigation　pointed　out　some　problems　on　which　emphases　should　be　placed　when　the　HEDMS　are　designed.