To　achieve　the　purposes　of　collaborative　bearing　the　horizontal　seismic　force　by　using　of　the　sliding-pier　and　the　fixed-pier,　the　locking　dowel　by　acceleration　activating　was　presented.　The　locking　dowel　could　restrict　the　relatively　displacement　between　the　sliding-piers　and　beams　under　strong　earthquakes.　The　damping　effect　of　the　locking　dowel　was　illustrated　in　the　different　site　conditions　combined　with　a　bridge　project,　at　the　same　time,　the　influence　of　the　site　condition　on　the　selection　of　parameters　and　the　adaptability　of　pier　height　was　systematic　analyzed.　The　research　results　indicate　that　the　locking　dowel　can　indeed　improve　the　seismic　performance　of　continuous　bridge,　thus　reduce　the　seismic　response　on　the　fixed　pier　and　the　relatively　displacement　between　the　piers　and　beams.　The　selection　range　of　parameter　is　sensitive　to　the　change　of　site　condition.　The　seismic　response　of　continuous　bridge　structure　is　reduced　rapidly　by　using　locking　dowel　in　the　second-class　site,　the　third-class　site　and　the　fourth-class　site.　But　the　locking　dowel　is　feasible　only　for　the　continuous　bridges　with　middle　and　high　height　pier　in　the　first-class　site.　©,　2015,　Huazhong　University　of　Science　and　Technology.　All　right　reserved.