Along　with　the　development　of　subway　construction,　a　new　type　of　structure　with　long　span　and　Y　shaped　column　comes　up.　It　is　different　from　the　existing　subway　station　structure,　the　space　is　tall　and　spacious,　which　shows　a　comfortable　environment.　In　order　to　study　the　seismic　performance　of　subway　station　structure　with　this　new　type,　taking　Xinhua　Street　station　of　the　Beijing　Metro　Line　6　as　engineering　background,　FLAC3D　was　used　to　build　the　soilunderground　structure　dynamic　model　of　three-dimensional　finite　difference　to　simulate　the　response　process　under　the　Xinhua　Street　artificial　seismic　wave　excitation.　Emphasis　is　put　on　the　analysis　of　the　law　of　acceleration,　displacement　and　strain　of　both　Y　shaped　column　and　side　wall　of　the　station.　The　numerical　results　are　also　compared　with　the　shaking　table　test.　The　results　show　that　the　numerical　results　are　basically　identical　with　the　shaking　table　test,　which　reflects　the　similar　structure　response.　The　maximum　acceleration　of　Y　shaped　column　occurred　at　the　position　just　a　little　down　from　the　top　of　the　column,　not　at　the　top.　Strain　changes　suddenly　at　the　bifurcation　position　of　Y　shaped　column,　where　this　position　also　has　the　largest　response　displacement　relative　to　the　bottom　of　column　and　with　abrupt　change,　so　this　is　the　part　to　be　reinforced　in　aseismic　design.　The　acceleration　and　change　of　displacement　of　Y　shaped　column　are　both　larger　than　side　wall.　The　results　above　may　provide　reasonable　reference　and　guidance　to　improve　the　seismic　performance　and　seismic　design　for　similar　subway　station　structure.　©　2017,　Editorial　Office　of　Chinese　Journal　of　Theoretical　and　Applied　Mechanics.　All　right　reserved.