As an important part of floating wind turbine,the flexible components have great impact on its overall security.In order to study the dynamic response of flexible components under wind and waves,based on the calculation method which combines modal truncation method with multi-body dynamics, the paper used hydrodyn-aerodyn-elastodyn-servodyn fully coupled FAST software an selected three representative floating wind machine as the research object to study its dynamic response.The results show that in the role of waves flow, the displacement of blade tip waving of three floating wind turbine is larger, the displacement of blade tip shimmy is smaller; the displacement of spire shimmy of Spar and Barge is similar, the displacement of TLP spire shimmy varies more greatly; the mean value of root loads of three floating wind turbine is similar, but the root waving moment of Barge changes greatly; the generator power of Spar and TLP is more stable and keeps around 5MW.The generator power of Barge is smaller and fluctuates largely.