Abstract: A dynamic model was established for the aerodynamic-hydrodynamic-mooring coupling of floating wind turbines by secondary development of AQWA through Fortran programming, while an algorithm was selected to solve the model. Considering the coupling effect of wind and wave, a study was carried out on the influence of the parameters of different catenary mooring systems on the dynamic response of 3 floating wind turbine platforms and on the corresponding parameters of each system in the wind turbine. Results show that the system parameters have a great effect on the maximum surge and heave, but have a small influence on the maximum pitch angle and cabin acceleration. Moreover, the maximum tension at different mooring positions is different, so the selection of appropriate mooring position can effectively enhance the stability of the platform. The mooring system with catenary of larger diameter would result in higher stability of Barge platform. The distance between connection point and free surface, and the length and diameter of catenary have a great effect on the maximum surge and mooring tension of the Semi platform, which have a small influence on the maximum heave, pitch angle and cabin acceleration.