To　study　the　dynamic　response　of　a　curved　girder　bridge　with　the　longitudinal　slope　under　seismic　action,　taking　a　ramp　bridge　as　an　original　bridge,　we　designed　and　produced　a　1:10　scale　model　of　curved　bridge.　Furthermore,　seismic　simulation　shaking　table　tests　with　the　seismic　waves　input　in　X-direction,　Y-direction　and　X+Y-direction　were　carried　out.　The　influence　of　horizontal　seismic　action　on　seismic　response　of　curved　girder　bridge　was　analyzed.　The　results　show　that　the　seismic　waves　input　in　X-direction　can　cause　the　translation　and　rotation　of　the　main　girder,　and　cause　the　in-plane　bending　of　the　main　girder.　The　rotation　effect　of　the　main　girder　caused　by　Y-direction　input　is　smaller.　High　piers　can　amplify　the　effect　of　pier　displacement.　The　smaller　the　angle　between　the　pier　displacement　and　the　direction　of　the　seismic　wave　input　is,　the　more　obvious　the　displacement　response　of　the　pier　will　be.　The　fixed　pier　is　more　disadvantageous　to　displacement　response　in　bidirectional　seismic　waves　input.　The　smaller　the　angle　between　the　bearing　displacement　and　the　direction　of　the　seismic　wave　input　is,　the　larger　the　bearing　displacement　will　be.　When　seismic　wave　is　input　in　X-direction,　it　is　easy　to　cause　the　girder　falling　at　the　low　pier　and　collisions　at　the　high　pier.　When　seismic　wave　is　input　in　Y-direction,　it　is　easy　to　cause　the　girder　falling　at　the　high　pier　and　collisions　at　the　low　pier.　©　2019,　Journal　Press,　China　Railway　Bridge　Science　Research　Institute,　Ltd.　All　right　reserved.