The wave overtopping of vertical revetment with arc crown wall is reduced compared with the crown wall without arc,and the elevation of crown wall can be reduced too.Taking the design of the elevation of a vertical revetment’s crown wall as an example,the author calculates the elevation of crown wall in accordance with the current related specifications,and calculates also the wave overtopping according to the experiential formula proposed in some literatures.For the most economical and reasonable elevation of the crown wall,the wave overtopping is validated by physical model test,the measured wave overtopping by physical model test and the calculated wave overtopping according to the experiential formula are compared,and the elevation of the arc crown wall is determined ultimately.