Aiming at the huge wave energy generated by wave motion，we design a wave energy conversion model composed of Savonius rotor and a double-buoy floating breakwater. In order to study the energy capturing and wave elimination performance of the new type of breakwater，we optimize the parameters of the model structure，obtain the optimal water penetration depth of the model by data interpolation on the basis of the experimental data，then test the model under different incident wave heights and different wave periods，analyze the measured capture power coefficient，transmission coefficient and other data，apply the STAR-CCM+ software for numerical simulation on the basis of the theory of viscous fluids，and compare with the physical experiment results for verification.The results show that the model has the best wave elimination performance when the energy capture performance of the model is in the best range，which means that the model successfully captures and transforms wave energy. The variation trend of the simulated data is basically consistent with the experimental data，and the differences of data are within the error allowable range.