This open access book. This book primarily introduces the dynamic analysis of typical offshore wind turbines foundations in soft clays under marine environmental loads. The dynamic behaviors and bearing performance of offshore wind turbines foundations will be interesting to students and researchers in offshore geotechnical engineering. This book systematically elaborates on numerical analysis methods and dynamic response laws of offshore wind turbine foundations using the calculation flowchart, numerical model diagram, and displacement vector diagram, etc. It can guide readers to apply numerical methods to explore dynamic behavior of offshore foundations, and address the challenges in the design of offshore wind turbine foundation.