The　impact　of　large　passenger　flow　during　peak　hours　causes　serious　congestion　in　subway　stations,　and　passenger　flow　bottlenecks　appear　in　many　places,　which　affects　travel　efficiency　and　safety.　How　to　eliminate　the　bottlenecks　is　an　urgent　problem　to　be　solved.　In　this　paper,　we　first　analyze　the　causes　and　regions　of　bottlenecks,　and　we　propose　three　decongestion　solutions:　(a)　moving　the　security　check　machines　from　the　station　hall　to　the　entrance　channel;　(b)　adding　isolation　belts　in　front　of　the　area　of　escalators;　and　(c)　separating　opposite　passengers　flow　by　using　isolation　belts.　We　conduct　a　case　study　on　Guomao　Station,　Beijing,　China　to　verify　the　effectiveness　of　the　solutions.　Specifically,　we　establish　a　microscopic　model　to　simulate　the　passenger　flow　in　a　subway　station,　and　the　simulation　results　show　that　decongestion　solutions　can　reduce　the　queueing　length　of　security　bottleneck　by　more　than　30%,　while　decreasing　the　passenger　density　in　non-paying　areas　of　the　station　hall　by　more　than　50%.　The　decongestion　solutions　proposed　in　this　paper　can　eliminate　the　bottlenecks　in　subway　stations　effectively　and　practicably.