Abstract: In order to improve the dynamic response characteristics of offshore wind turbines under wind and wave loads, a new type of bionic keel-like inner ribbed tower was proposed. The dynamic response and buckling characteristics of the tower were simulated with a finite element approach considering turbulent wind, wave loads, and nonlinear soil-structure coupling. Results show that under the action of wind and wave load, compared with the traditional tower, the displacement of the top of the bionic tower is smaller, which can effectively suppress the influence of wind and wave load, and the stress distribution is reasonable. The high-stiffness inner rib structure can ensure the stability of the tower, but it will lead to the increase of local stress to a certain extent. Compared with the traditional tower, the buckling mode displacement of the bionic tower is relatively small, which indicates that the bionic tower can effectively improve the instability resistance of the tower.