Abstract: Wind turbine manufacturers and foundation designers design tower and jacket respectively, due to their distinct responsibilities. This separated design is carried out through load transfer at the bottom of the tower and its sizestructural style and dimensions are determined by repeated iterations through load transfer at the bottom of the tower. In addition, the design of offshore wind turbine jacket typically refers to offshore oil platforms and other regulations, ignoring the unique characteristics of offshore wind turbines. The above two reasons restrict the mechanical properties of the supporting structure to a large extent, which leads themore iterative processnumbers and cannot capture the dynamic responses of the overall structure. A structural design of jacket utilizing topology optimization wasis presented to address these challenges. The structural performance is further enhanced by relocating the interface between tower and jacket, hence expanding the design space. NREL 5 MW offshore wind turbine was chosen as the reference.The structural responsesnatural frequency and maximum deformation of the novel structures resulted from thereference structure, topology optimization structure and integrated design were provided.structure under different limit conditions are compared respectively.The results demonstratedprove the efficiencyeffectiveness and superiority of the proposed method of integrated design method for support structures.