Considering　the　effect　of　dynamic　interaction　between　liquefiable　soil　and　underground　structure,　simulating　the　nonlinear　seismic　response　of　underground　structures　through　simple,　convenient,　and　reliable　3D　numerical　model　is　still　a　great　challenge　at　present.　A　three-dimensional　numerical　simulation　method　for　dynamic　response　of　underground　structure　in　liquefiable　site　is　proposed　based　on　the　centrifuge　shaking　table　test　designed　for　a　subway　station　buried　in　liquefiable　interlayer　site　carried　out　in　the　previous　period.　The　numerical　model　takes　into　account　the　characteristics　of　sand　prone　to　large　deformation　after　liquefaction　and　the　nonlinear　characteristics　of　the　contact　between　saturated　soil　and　structure.　The　typical　numerical　calculation　results　are　compared　with　the　experimental　results　to　verify　the　correctness　of　the　numerical　model,　and　the　extended　analysis　of　the　structural　damage　is　carried　out,　which　visually　shows　the　damage　distribution　of　structure　under　different　functional　states　after　earthquake.　The　analysis　of　structural　damage　shows　that　the　junction　position　of　middle　column　and　longitudinal　beam　is　more　prone　to　tensile　damage　under　the　horizontal　earthquake　action;　while　after　considering　the　horizontal-vertical　seismic　effect,　the　middle　column　will　produce　additional　compressive　damage　due　to　the　vertical　inertia　force,　and　the　end　of　middle　column　should　be　paid　attention　to　in　seismic　design.