The permeable breakwater with wave baffle can provide moderate sea for berthing by weakening the wave energy. Hydrodynamic property of flow closed to the structure is strongly affected for the resistence produced by the immersed pile and wave baffle. To study the affected hydrodynamic property of flow by wave panel in two-dimensional tidal numerical model, the wave panel is generalized by the method of discharge-equivalent and resistance-equivalent respectively, which equals approximately the retaining effect caused by wave panel to similar effect caused by adding depth or adding roughness. The results show that both methods can simulate the waterresistance effect of wave panel, and the simulation results of resistance-equivalent method is more consistent with practical rules.