In the construction of overseas rubble mound breakwaters by domestic design firms,the commonly used design codes mainly include the Chinese JTS 154—2018 Code for Design of Breakwater and Revetment and the British code BS 6349-7.Due to the differences between the two design methods,there are certain limitations in the international application of domestic codes.Combining with the two design codes,we use the comparative analysis method to discuss the design methods of wave,section structures,breast wall,slope,protective surface block,cushion block stone,riprap prism,bottom protection and submerged dike of rubble mound breakwater.The results show that the differences between the two codes are mainly reflected in the design concept,calculation formula and parameters,and structural requirements.These differences reflect the different development levels and engineering practice characteristics of the two countries in the field of breakwater design.Through the results of comparative study,we can better understand and apply these differences,and provide more scientific and reasonable suggestions for the design of breakwaters at home and abroad.