With　the　rapid　development　of　traffic　infrastructure　construction　in　western　mountain　area,　the　lining-stratum　interaction　mechanism　of　mountain　tunnel　under　seismic　effects　has　attracted　increasing　attentions.　Based　on　the　prototype　of　a　regular　two-lane　highway　tunnel　section　with　V-grade　surrounding　rock,　a　static　pushover　model　test　for　mountain　tunnel　was　conducted.　The　variations　of　stratum　displacement,　stratum　strain　and　ground　pressure　with　pushover　distance　were　carefully　studied,　and　the　lining-stratum　interaction　mechanism　was　thoroughly　discussed.　The　test　results　show　that:　the　lining-stratum　interaction　can　be　generally　divided　into　compacting　stage,　overturning　stage,　and　dragging　stage.　The　stratum　tends　to　circumferentially　flow　along　the　lining　perimeter　from　the　springing　line　in　the　overturning　stage,　and　then　drives　the　lining　to　shift　together　in　the　dragging　stage.　The　stratum　near　the　springing　line　experiences　predominantly　radial　compression,　forming　a　compression　deformation　zone,　while　the　stratum　near　the　lining　shoulder　mainly　undergoes　circumferential　compression,　forming　a　slip　deformation　zone.　The　response　of　the　ground　pressure　on　the　left　and　right　sides　are　exactly　opposite.　Specifically,　the　ground　pressure　in　the　compression　deformation　zone　on　the　right　side　is　greater　than　its　counterpart　on　the　left　side,　while　the　ground　pressure　in　the　slip　deformation　zone　on　the　right　side　is　less　than　its　counterpart　on　the　left　side.　These　researches　can　provide　some　experimental　basis　and　technical　support　for　the　anti-seismic　calculation　of　mountain　tunnels　based　on　response　displacement　method.