With the development of bridge construction in China, some bridges connected sea bay or strait will be built, such as Hong Kong-Zhuhai-Macao Bridge, Qiongzhou strait Bridge and so on. These bridges will face more atrocious natural conditions than the bridges built in the rivers. Tide, typhoon and wave will influence on the safety of the bridge structure and the water depth will be much deeper than in river. At present, in China the research on wave action on bridge pier has been done rarely due to former bridges being constructed almost in the river and the wave load small, however the wave load is an important factor for strait bridge structure design. If we can???t grasp the disciplinarian of wave effecting on the bridge, it will effect on the design of bridge structure in further. So it has the important significance to study wave acting on pier in deep water. And the object of research is to provide the reference and basis for the design of strait bridge in the future. In this paper, the wave force on the rectangle of cross-section pier has been studied under the different conditions by physical model test. It will introduce the physical model setup and then according to the test data, analyze the relationship of wave spectrums and force spectrums on the pier. Results indicate there is the strong relativity between wave and force, not only the characteristic parameter, such as H1/3 and F1/3, but also the wave spectrum and force spectrum
