To obtain typical components load level range in practical service environment,by selecting design examples for three marina beam members in service,and taking the beam,stringer and track beam as the research object,we analyze the component load level under the “permanent load”or“permanent load plus variable load”. Besides,taking a high-pile wharf in Southern China for case study,we carry out the site stress test and analysis,and obtain the load level in the actual service environment.Based on the site stress testing and theoretical analysis of typical examples,we determin that the load level range for the wharf under normal condition shall be from 0.1 to 0.47,which provide the basis for conducting simulation tests in load-service marine structures and provide a reference for the pier design.