Based　on　the　prototype　of　an　irregular　section　subway　station　with　a　five-span　upper　layer　and　three-span　lower　layer,　a　series　of　shaking　table　tests　were　performed　to　investigate　the　dynamic　interaction　of　a　liquefaction　soil　and　an　irregular　section　subway　station.　In　this　test,　a　model　foundation　preparation　method　based　on　flexible　sensing　chain　combined　with　water　sedimentation　method　was　proposed,　and　the　shape　acceleration　array　was　adapted　to　measure　the　horizontal　deformation　of　the　foundation.　The　development　and　spatial　distribution　of　excess　pore　water　pressure　and　the　deformation　of　the　model　foundation　were　analyzed　in　the　horizontal　and　vertical　direction.　The　results　show　that　excess　pore　water　pressure　is　mainly　accumulated　in　the　process　of　earthquake,　the　excess　pore　water　pressure　ratio　is　significantly　correlated　with　the　Arias　intensity,　and　its　spatial　distribution　is　changed　by　the　underground　structure.　The　remarkable　floating　of　model　structure　occurs　not　only　in　the　process　of　earthquake　but　also　in　the　dissipation　of　excess　pore　water　pressure.　With　the　expansion　of　the　liquefaction　area　and　the　increase　of　liquefaction　degree　of　saturated　sand,　the　uneven　settlement　and　inclination　of　underground　structure　are　clearly,　the　difference　of　section　form　should　be　considered　in　the　anti-floating　design　of　an　underground　structure.　©　2020,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.