Fringing reefs with a steep fore-reef slopes are commonly complex and distinct in shape, bottom roughness and hydrodynamic conditions. Due to different input conditions, simulating the wave propagation process on fringing reefs with large fore-reef slopes is challenging to calculate according to current standards, complicating the design of structures on these reefs. Therefore, this paper proposes a numerical model that simplifies addressing this issue. This paper addresses the issue by employing the numerical model REEF3D::CFD to simulate the wave propagation process on fringing reefs with large fore-reef slopes. REEF3D::CFD is an open-source CFD model capable of simulating the interaction between fluid and terrain, incorporating complex structures based on the RANS equations coupled with a complex free surface modeling using the level set method. The simulation results have been validated with experimental data in the same conditions. A detailed validation of water levels, velocities, and wave parameters at measurement points also shows good agreement with physical model data. The validation results determine that REEF3D::CFD can demonstrate wave propagation on fringing reefs in an accurate and efficient way.