There　is　no　standard　for　rock-socketed　pile　foundation　of　offshore　wind　farm　at　China　and　abroad.　According　to　the　practical　geological　and　environmental　conditions　of　offshore　wind　power　plant,　response　of　rock-socketed　pile　under　horizontal　load　was　analyzed　by　using　a　finite　element　software,　ABAQUS.　Then,　the　parameters　of　rock-socketed　pile,　i.e.　depth,　pile　diameter,　ratio　of　pile　diameter　to　thickness,　and　grouting　thickness　were　investigated　by　orthogonal　analysis　and　parametric　analysis.　It　is　found　that　the　thickness　of　grouting　has　little　influence　on　the　displacement　of　pile　head.　The　diameter　and　the　ration　of　diameter　to　thickness　of　pile,　rock-socketed　depth　have　significant　influence.　The　displacement　of　pile　tip　tends　to　stable　and　the　bending　moment　at　bottom　of　pile　become　zero　when　the　rock-socketed　depth　reaches　3dp.　The　maximum　Tresca　stress　of　grouting　body　and　1st　principal　stress　of　rock　mass　decrease　with　an　increase　of　rock-socketed　depth.　©　Published　under　licence　by　IOP　Publishing　Ltd.