The　dynamic　pile-soil　interaction　in　a　liquefied　site　was　investigated　by　means　of　numerical　simulation　and　shaking　table　tests　in　this　study.Based　on　the　results　from　the　shaking　table　experiment,the　cross-correlation　analysis　of　the　soil　displacement-pile　bending　moment　and　superstructure　acceleration-pile　bending　moment　was　performed　to　study　the　influence　of　kinematic　interaction　and　inertial　interaction　on　the　seismic　response　of　piles.A　relatively　reasonable　and　accurate　finite　difference　numerical　analysis　model　of　liquefiable　soil-pile　group-superstructure　dynamic　system　was　established.Through　numerical　simulation,the　understanding　of　kinematic　interaction　and　inertial　interaction　in　the　shaking　table　test　was　verified.The　mass,damping　and　period　of　the　superstructure　were　selected　as　variables　to　carry　out　parameter　analysis　to　further　study　the　influence　of　inertial　interaction　on　the　pile-structure　failure　mechanism.The　results　show　that　the　influence　of　kinematic　interaction　on　the　pile　was　much　greater　than　that　of　inertial　interaction.The　mass　of　the　superstructure　was　the　most　important　parameter　of　inertial　interaction,and　dynamic　characteristics　of　the　superstructure　also　had　an　effect　on　inertial　interaction.The　effect　of　inertial　interaction　on　the　part　near　the　pile　tip　was　more　significant,indicating　that　the　failure　near　the　pile　tip　is　closely　related　to　inertial　interaction.