To study the effect of the container crane to the seismic performance of the wharf structure,we study the dynamic response characteristics of the wharf structure under the seismic actions of different peak accelerations and near-field and far-field ground motions based on the 3D finite element model of crane-wharf structure. The effects of the dynamic response of container crane to the wharf structure dynamic characteristics under different seismic actions are analyzed. The study shows that the container crane has a significant impact on the natural vibration characteristics of the pile-supported wharf structure,making the period of the structure extended. Considering the container crane,the moment extremum of the pile-top gets decreased significantly. With the decrease of the shear force extremum,the position where the extreme value occurs gets down obviously. These will change the failure mechanism of the wharf structure. The near-field earthquake has the most significant impact on the structural dynamic response,which will be the main controlling factor of the elastic-plastic limit state.