A comparative study was made on seismic design of port and harbour structures based on Chinese code, US guidelines and Japanese standards as well as guideline of international navigation association. This is the fifth of the series papers and the method for seismic design of pile-supported wharf in these codes is analyzed. It is shown that for the design of pile-supported wharf, the response force generated by earthquake is determined based on acceleration response spectrum in Chinese code and spectrum acceleration in US guidelines, and the seismic coefficient obtained from analysis of seismic hazard and dynamic response of structures is used in Japanese standard. Several approaches are presented in US guidelines for deformation prediction.