In　this　study,　a　1/30　model　for　a　large　section　tunnel　is　firstly　designed　based　on　the　extension　project　of　Jinjishan　Tunnel　along　Fuzhou　2nd　ring　road.　Then　the　earthquake-simulating　tests　are　conducted　under　21　different　loading　conditions　using　a　bidirectional　earthquake　shaking　table　apparatus　at　Fuzhou　University.　Through　Fourier　analysis　of　testing　results,　it　indicates　that　the　existence　of　the　large　section　tunnel　changes　the　seismic　property　of　original　ground　significantly.　It　is　also　found　that　the　1st　predominant　frequency　reflects　the　seismic　properties　of　original　ground,　while　the　2nd　predominant　frequency　demonstrates　seismic　properties　of　the　lining　structure.　The　frequency-response　analysis　of　testing　results　shows　that　the　components　augment　significantly　around　the　2nd　predominant　frequency,　when　the　seismic　wave　propagates　from　the　bottom　to　top　until　the　lining　structure.　The　most-augmented　frequency　almost　equals　to　the　2nd　predominant　frequency.　The　relationship　between　the　seismic　property　of　the　large　section　tunnel　and　the　amplitude　of　input　ground　motion　is　studied　in　detail.　The　apparent　cracks　emerge　on　the　lining　structure　after　the　excitation　by　the　large　ground　motion,　which　significantly　reduces　the　overall　stiffness　of　the　large　section　tunnel.　Moreover,　both　the　2nd　predominant　frequency　and　the　most-augmented　frequency　show　remarkable　reductions.　In　conclusion,　this　study　provides　some　useful　suggestions　for　the　earthquake　fortification　of　the　large　section　tunnel.　©　2016,　Science　Press.　All　right　reserved.