Based on the physical model test,we study the influence of the slope,wave steep and the style of placing the accropode on the reflection coefficient under the action of irregular waves,and compare the reflection coefficients with the Seeling formula,the Sutherland formula and the Van der Meer formula.The results show that the slope is proportional to the reflection coefficient,the wave steep is inversely proportional to the reflection coefficient,and the arrangement of the accropode has little effect on the reflection coefficient.The test values are generally larger than the calculated values of the three formulas,where the difference between the calculated values and the calculated values of the Seeling formula is small.