In　this　study,　a　series　of　shaking　table　tests　were　carried　out　based　on　an　irregular　cross-section　subway　underground　structure.　Further,　the　development　laws　of　pore　pressure,　structural　strain,　acceleration　intensity,　and　the　propagation　law　were　analyzed.　The　results　show　that　the　peak　acceleration　of　the　surface　is　attenuated,　which　reflects　the　isolation　effect　of　the　liquefied　soil.　The　spectral　characteristics　of　the　liquefied　foundation　soil　reflect　the　low　frequency　band　concentration　and　amplification　effects.　Moreover,　there　is　a　significant　floating　phenomenon　in　the　model　structure　during　the　earthquake.　With　an　increase　in　the　degree　of　liquefaction　at　the　site,　the　uneven　settlement　and　slope　of　the　variable-section　underground　structure　become　more　significant.　The　dynamic　strain　on　each　member　of　the　structure　shows　that　the　middle　column　has　the　largest　reaction,　the　sidewall　is　the　second　largest,　and　the　floor　has　the　smallest;　the　bottom　end　of　the　lower　middle　column　is　most　vulnerable　to　damage.　A　modified　dynamic　constitutive　model　was　used　for　soil;　the　rate-independent　plastic-damage　constitutive　model　was　used　for　concrete　in　the　numerical　simulations　using　the　finite　element　method.　The　difference　between　the　results　obtained　by　numerical　analysis　and　shaking　table　tests　is　discussed　in　detail.　The　results　provide　insight　into　how　strong　ground　motion　may　induce　the　liquefaction　of　soil.