Abstract: The numerical modeling of the floating foundation (floating platform and mooring system) of floating wind turbines mainly refers to the offshore drilling platform. Its calculation theory focuses more on the safety of the structure and has lower requirements on cost. Its simulation results are less accurate for floating wind turbines with high cost requirements. Moreover, the simulation of floating wind turbines needs to consider the influence of the wind effect and the coupling of aerodynamic and hydrodynamic. It is very necessary to establish a high-precision numerical model of the floating foundation that can consider the influence of the superstructure for hybrid tests of wind turbines under wind-wave coupling conditions. At present, the numerical simulation software that can consider the coupling of aero- and hydro-dynamic effects is mainly based on OpenFast. However, its hydrodynamic parameters for simulating the structural motions depend on analysis by other software. AQWA, a software that can consider many details, provides more accuracy results, however, it cannot take the wind effect into account. Therefore, the paper builds a fine model of a wind turbine and then considers the aerodynamic effects by adding the full boundary conditions at the interaction face between the superstructure and the floating foundation.