The wave attenuation characteristics of typical perforated breakwater are researched based on practical engineering applying pile foundations and with wave walls and wave boards installed.Wave heights are measured to analyze the influence of structure forms on wave heights and propagation.Wave forces on superstructures are measured to analyze the influence of different forms of wave walls or boards on structure stress.At last,the correlation between wave height and structure stress,which are both influenced by structure forms,is studied.Results show that a reasonable design of superstructure could effectively reduce structure stress while fulfilling the need for wave attenuation.