Referring　to　the　structural　parameters　of　NREL　offshore　wind　turbine，a　three-dimensional　finite　element　model　of　offshore　wind　turbine　supported　by　pile-bucket　composite　foundation　in　clay　is　established　based　on　ABAQUS　software　platform.　The　non-linear　kinematic　hardening　model　in　the　form　of　total　stress　is　used　to　describe　the　undrained　dynamic　stress-strain　response　of　clay.　The　random　wind　loads　and　wave　loads　are　simulated　by　compiling　MATLAB　program.　The　time-domain　overall　dynamic　response　analysis　of　offshore　wind　turbine　supported　by　pile-bucket　composite　foundation　under　earthquake，wind，wave　and　current　loads　is　carried　out，and　then　the　bearing　mechanism　of　pile-bucket　composite　foundation　is　revealed.　The　influence　of　seismic　intensity，soil　strength　and　foundation　size　on　the　dynamic　response　of　pile-bucket　composite　foundation　is　analyzed.　The　research　results　can　provide　guidance　for　the　seismic　design　of　pile-bucket　composite　foundation　for　offshore　wind　turbine　in　clay.　©　2024　Science　Press.　All　rights　reserved.