Based on the implicit module and the FEM-IEM coupling model of ABAQUS, we study the dynamic response of the single anchor sheet pile wharf under the seismic load. It is found that the peak acceleration has a great effect upon the sheet pile bending moment, shear force and tension force of tension bar with the same seismic wave in different peak accelerations. Comparing with the data of static analysis, the sheet pile’s maximum bending moment grows by 40% and the tension force of tension bar by 10% to 50% as the seismic peak acceleration increases by 0.1g, but the growing rate of tension force of tension bar tends to be stable at the end. Under the seismic load, the maximum tension force of tension bar closes to the maximum shear force per unit width on the sheet pile. This paper makes a study on the impact of seismic peak acceleration upon the range of plastic zone between sheet pile bottom and anchorage wall. The results show that seismic ground motion imposes an important effect on the sheet pile wharf in comparison with static load, thus it provides references for design of the sheet pile wharf under the influence of earthquake.