This paper analyzes the influence of harbor basin excavation near revetment on the stability of revetment based on the physical model test.The results show that:before and after the excavation of the harbor basin,6 t Chinese accropode and breast wall are instable,the back of the breast wall scours seriously,the wave height increases or decreases about 2% near the toe,the overtopping volume increases or decreases about 9% behind the beast wall.The toe protection stone has slight deformation after excavation,but it is not the direct reason for the revetment damage.The direct reason is the low elevation at the top of the breast wall.Overtopping generates a large scour pit which leads to the unstability of the breast wall and the revetment structure damage.The repair section drawing is obtained according to the comprehensive consideration of the revetment,wharf and the intake head.The repair section is confirmed safe and reliable by the physical model test,and it has already applied to the engineering practice.