A riprap structure slope breakwater in eastern Guangdong has been frequently attacked by strong typhoons since its completion,and the armour layer has been damaged many times.To ensure the stability of the main structure of the breakwater,it is necessary to strengthen the weak position of the breakwater to improve its overall protection ability.This paper expounds that the engineer has strengthened the section of the breakwater structure on the basis of analyzing the damage causes of the breakwater,according to the new specification requirements and new design wave elements,and has carried out optimization comparison and verification through physical model tests.Finally,the reinforcement scheme of adding one layer of larger Chinese accropode to the existing fixed-point random placement of the Chinese accropode is determined.The engineering practice has proved that after using double-layer Chinese accropode for reinforcement of the breakwater,the overall stability of the structure is good,its ability to resist wind and waves can be significantly improved.The scheme is simple and has strong operability.It is suitable for repair and reinforcement of mound-type breakwater and can be used as reference for similar projects.