Near-fault　ground　motion　records　of　TCU051-EW,　TCU052-EW,　TCU054-EW,　TCU068-EW,　TCU068-NS,　TCU082-EW　from　the　Chi-Chi　earthquake　in　Taiwan　were　selected　as　seismic　inputs,　and　then　time　history　a-nalysis　of　elasto-plastic　seismic　responses　of　a　single-layer　three-span　representative　subway　station　with　arched　cross　section　in　Beijing　were　carried　out　using　finite　difference　procedure　FLAC.　The　influence　of　two　different　kinds　of　near-fault　ground　motion　caused　by　rupture　forward　directivity　and　fling　step　on　the　dynamic　responses　of　the　representative　subway　station　structure　was　studied.　It　was　shown　that,　although　seismic　peak　ground　accelerations　of　rupture　forward　directivity　and　fling　step　were　set　as　the　same,　the　relative　horizontal　displacement,　the　peak　acceleration　and　the　seismic　stress　of　the　structure　caused　by　fling-step　ground　motion　are　significantly　larger　than　those　caused　by　rupture　forward　directivity　ground　motion,　which　implied　that　the　fling-step　ground　motion　caused　more　severe　damage　to　underground　structures　than　the　forward　directivity　ground　motion　did;　when　the　seismic　input　was　rupture　forward　directivity　ground　motion,　the　middle　positions　of　arched　roofs　of　middle　spans,　the　middle　positions　of　arched　roofs　of　side　spans,　and　the　top　positions　of　columns　had　larger　horizontal　accelerations　than　the　bottom　of　the　structure　did,　which　meant　the　horizontal　acceleration　of　the　top　of　the　structure　was　amplified　under　rupture　forward　directivity　ground　motion;　when　the　seismic　input　was　fling-step　ground　motion,　the　top　of　the　structure　had　smaller　horizontal　accelerations　than　the　bottom　of　the　structure　did,　which　meant　the　horizontal　acceleration　of　the　top　of　the　structure　was　reduced　under　the　fling-step　ground　motion.　The　rupture　forward　directivity　ground　motion　had　more　severe　dynamic　response　on　the　top　of　the　structure,　while　the　fling-step　ground　motion　had　more　severe　dynamic　response　at　the　bottom　of　the　structure.