In　this　paper,　we　study　the　seismic　behavior　of　pile　group　bridges　in　inclined　liquefiable　soil　and　reveal　the　failure　mechanism　by　conducting　large-scale　shaking　table　tests.　Two　bridge　models　were　supported　by　two　foundations:　a　group　pile　in　an　inclined　liquefiable　site　and　a　rigid　foundation.　Typical　results　of　the　model　test　under　a　strong　event　(Tabas　0.3　g)　are　illustrated,　and　the　effects　of　soil-group　pile-bridge　interaction　are　explored.　The　inertial　and　kinematic　effects　of　the　pile-pier　curvature　are　evaluated,　and　the　seismic　failure　mechanisms　of　the　pile-bridge　system　are　revealed.　The　results　demonstrated　that　the　near-pile　shallow　soil　exhibited　significant　shear　dilation　response　during　the　occurrence　of　strong　earthquakes,　which　induced　acceleration　spikes　for　both　soil　and　structure.　The　interaction　state　was　soil　pushing　the　pile　and　pile　pushing　the　soil　during　the　first　and　the　subsequent　strong　earthquake,　respectively,　due　to　the　bridge　P-Δeffect.　The　liquefaction-induced　lateral　spreading　increased　the　kinematic　effect　and　reduced　the　inertial　effect　on　the　pile　head　curvature.　In　addition,　the　inertial　effect　on　the　pile　curvature　decreased　gradually　from　the　shallow　layer　to　the　middle　of　liquefiable　soil,　while　the　kinematic　effect　increased　gradually.　The　results　also　demonstrated　that　the　rigid　foundation　assumption　overestimated　the　acceleration　demand　of　the　bridge　during　strong　earthquakes;　however,　it　seriously　underestimated　the　lateral　displacement.　Finally,　the　lateral　spreading　shifted　the　vulnerable　position　of　the　pile　group-pier　system　from　the　pier　bottom　to　the　pile　head　and　bottom,　and　the　leading　piles　sustained　more　damage　than　the　trailing　piles.　　©　2023　American　Society　of　Civil　Engineers.