Assembled　monolithic　metro　station　is　a　potential　kind　of　structure　technique　to　solve　a　series　of　problems　caused　by　the　cast-in-situ　concrete　technique　used　in　the　traditional　construction　way　of　metro　station.　Seismic　properties　of　this　underground　structure　are　modeled　and　studied　based　on　the　response　deformation　method,　different　mechanical　properties　of　assembling　joints　and　different　strata　conditions　are　considered.　Results　indicate　that　its　seismic　properties　possess　great　sensibility　to　the　mechanical　properties　of　assembling　joints,　with　pillar　to　be　the　most　sensitive.　Thus　sufficient　attention　should　be　paid　to　seismic　design　and　construction　quality　of　the　assembling　joints.