This paper carries out a research on the wave forces of wave wall with wave boards by physical model.The research results show that the horizontal wave force and uplift pressure presence the double peak phenomena under the action of regular wave；the total horizontal wave fore and uplift pressure increase with the increase of wave height and water depth,and decrease at first and then increase along with the increase of wave smoothness.Different angles of wave walls with wave boards have nothing to do with the distribution of the wave pressures,and under the same work condition,wave forces increase with the decrease of dip angle.Hereby,we find the formulae for the horizontal wave pressure coefficient under different angles,and can give suggestions for the engineering design.