A　new　combination　structure　of　station　and　bridge　has　been　appeared　in　the　high-speed　railway　and　track　projects.　It　is　necessary　to　research　its　composition　form,　structure　properties　and　seismic　effects.　In　the　paper,　the　bridge　and　building　complex　structural　system　is　proposed　as　a　new　seismic　structural　system,　and　The　configuration,　simplified　model　and　the　formulation　of　the　2-degree　of　freedom　equations　of　motion　for　the　structure　are　provided.　The　optimal　parameters　are　obtained　from　parameter　optimization　analysis　has　been　done.　A　steel　frame　complex　structural　model　with　energy　dissipation　devices　is　designed　in　our　research　for　a　large　scale　shaking　table　dynamic　test.　The　research　results　show　that　the　complex　structure　has　good　reduction　vibration　effect.