L-framed wharf is irregular in plan with uneven distributed mass and stiffness, and torsion effect shall be considered under the horizontal earthquake effects. Using the finite element analysis software SAP2000, and considering the horizontal earthquake induced response along two main axes direction and spindle oblique direction of the structure, this article analyzes the elastic response spectrum considering torsion-coupled effects of L-framed wharf in inland river. Based on the numerical calculation for the internal force response and displacement deformation of this arrangement wharf structure under seismic action, this paper makes the evaluation for the dynamic bearing behavior of the wharf structure, and finds out the structural weak position, serving as reference for the engineering structure design and optimization.