The motion response of a floating offshore wind turbine (FOWT) platform is closely related to ensuring its safety. It is significant to decrease the motion response in the design of FOWTs. By integrating an external porous shell and internal Oscillating Water Column (OWC) devises with a floating wind turbine platform, a new-formed platform is designed to reduce the motion response. A numerical model, based on the nonlinear higher-order boundary element method (HOBEM), investigating the coupling effect of the platform-porous shell-OWCs was developed and validated by comparison with the physical experiments. The results of the motion response were compared with those of the conventional platform without the integrating parts. The motion response of the two kinds of platforms was simulated in the time domain. The study demonstrates a floating platform integrated with porous shell and OWC to achieve reduced motion response is feasible and can serve as a new design approach for the development of deep-sea offshore floating wind turbines.