Abstract: This paper presents one of the main basis for establishing the chapter about rubble-mound breakwater of the Standard of the Hydtology of Sea-port. On the basis of field investigation of some main rubble-mound in the People's Republic of China, we propose a rational type section of rubble-mound, reasonable analysis of destructive example, and discuss some other problems in designing. At the concluding part, the author makes some suggestions on designing about rubble-mound breakwater and standard clause.