More　and　more　projects　of　underground　tunnels　side-piercing　bridge　piles　have　emerged　in　recent　years.　In　this　paper,　in　order　to　investigate　the　law　of　seismic　response　of　a　short-distance　side-piercing　bridge　pile　system　in　a　tunnel　structure,　a　shaking　table　was　designed　and　implemented,　which　is　based　on　the　actual　engineering　background　of　a　tunnel　crossing　the　elevated　Line　3　bridge　pile　in　Dalian,　China.　Based　on　relevant　test　data,　the　acceleration　and　strain　responses　of　the　site　and　structure　were　analyzed　and　quantitatively　evaluated.　The　analysis　results　showed　that　the　presence　of　a　tunnel　or　bridge　pile　structure　significantly　reduces　the　frequency　of　the　system.　Regarding　the　law　of　seismic　response　of　interaction　system,　it　was　found　that　the　existence　of　the　tunnel　structure　and　bridge　pile　has　weakened　the　rigidity　of　the　whole　model,　and　therefore,　the　seismic　response　of　surrounding　soil　was　amplified.　It　was　observed　that　the　bridge　pile　suppresses　the　seismic　response　of　the　tunnel;　however,　the　tunnel　will　amplify　the　acceleration　response　of　the　bridge　pile.　In　addition,　the　existence　of　bridge　piles　increases　the　strain　response　of　the　tunnel,　and　the　strain　at　the　bottom　of　the　bridge　piles　increases　due　to　the　influence　of　the　sidewall　of　the　tunnel.