Currently,　research　on　the　underground　structures　seismic　fragility　is　still　in　its　infancy　state.　In　this　study,　we　carried　out　numerical　simulation　on　soil-underground　structure　system　(SUSI)　by　taking　the　Daikai　metro　station　damaged　in　the　Kobe　earthquake　as　analysis　object.　Considering　input　ground　motion　characteristics,　based　on　incremental　dynamic　analysis　(IDA　method),　a　statistical　numerical　modeling　method　was　established　to　classify　underground　structure　seismic　damage　status　and　its　seismic　performance　level.　The　analysis　results　showed　that　the　input　ground　motions　had　a　significant　effect　on　the　IDA　curves.　The　rationality　and　randomness　of　the　selected　ground　motions　were　important　influencing　factors　to　ensure　the　underground　structures　seismic　fragility　curves.　In　relation　to　the　damage　that　occurred　to　the　Daikai　station　in　1995,　the　peak　ground　acceleration　(PGA)　and　peak　relative　lateral　displacement　(PRLD)　of　the　site　were　suitable　for　estimating　the　seismic　performance　of　the　shallow　buried　structure　constructed.　Finally,　the　seismic　fragility　curves　were　compared　with　the　existing　research　results,　and　a　seismic　damage　assessment　was　carried　out,　which　verified　the　effectiveness　of　the　statistical　numerical　modeling　method　developed　in　this　study.