In　order　to　improve　the　safety　and　evacuation　efficiency　at　subway　platforms,　this　paper　discusses　the　applicability　of　staircase　position　to　evacuation　efficiency.　First,　we　summarize　the　characteristics　of　passengers　at　the　subway　platform.　After　that,　three　different　position　of　staircase　exits　are　chosen　to　be　the　object　of　study　and　a　simulation　scenario　by　AnyLogic　is　built　based　on　the　data　of　a　subway　platform　in　Beijing.　Finally,　we　analyze　the　applicability　of　three　scenarios　by　the　indictor　of　the　number　of　passengers　and　time　of　evacuation　process.　The　simulation　results　show　that,　in　comparison　with　three　forms　of　staircase,　the　staircase　exits　at　the　center　of　the　platform　have　the　worst　evacuation　capacity　among　the　three　options.　In　addition,　other　two　scenario　are　fit　to　different　volume　conditions.　Those　results　can　provide　some　guidance　to　the　facilities　design　in　subway　platform.