A　Shaking　table　test　was　carried　on　a　long-span　connected　structure　under　multi-dimensional　and　multi-supported　excitations.　To　investigate　the　influence　of　multi-dimensional　earthquake　components　and　wave　passage　effect　on　the　structure,　both　uni-dimensional　and　multi-dimensional,　uniform　and　multi-supported　earthquake　inputs　were　used　to　excite　the　structure.　The　experimental　results　show　that:　the　structural　responses　will　be　increased　when　multi-dimensional　earthquake　components　are　considered　simultaneously;　wave　passage　effect　may　increase　the　strain　of　some　key　elements　around　connections　significantly;　under　multi-dimensional　and　multi-supported　earthquake　excitations,　the　acceleration　responses　along　the　long-axis　of　the　structure　are　decreased　to　some　extent,　while　there　is　a　huge　increment　in　the　acceleration　responses　along　the　short-axis;　the　vertical　seismic　responses　of　the　corridor　will　be　increased　significantly　when　multi-dimensional　and　multi-supported　earthquake　excitations　are　taken　into　account.　Therefore,　it　is　suggested　that　multi-dimensional　and　multi-supported　earthquake　excitations　should　be　considered　during　the　aseismic　design　of　this　kind　of　structure.