The contact behavior of the steelconcrete joint surface has a serious influence on the static and dynamic characteristics of the structure. In order to avoid the numerical error caused by the process of identification, and the boundary condition error introduced by the large specimen, a test specimen was designed which could be used to consider the concrete and steel structures. The characteristic values of the longitudinal vibration were obtained by the analytical method of the rod theory. The natural frequency and damping ratio of the specimen were obtained by using the method of hammering experiment. By comparing the simulation results with the experimental results, the correctness and accuracy of the identification method are verified.It provides reference for analyzing the characteristics of differentinnature material joint surface.