Abstract: A seismic analysis method considering finite-fault source parameters is proposed by introducing the numerical simulation of seismic wave propagation into the soil-structure dynamic interaction analysis research field. Firstly, the stress, displacement and velocity of nodes on the truncated boundary of the soil-structure interaction system are calculated by the basis of the seismic wave propagation simulation method. Then, the seismic fluctuation of the finite-size model is simulated by the viscous-spring artificial boundary. The method proposed can analyze the influence of inertial forces caused by ground motion and co-seismic deformation caused by fault dislocation on the structure. The influence of fault occurrence, of dislocation distribution and, of rupture propagation mode on seismic load is considered. The procedure of the seismic analysis method for the soil-structure system based on the finite fault source is described. The effectiveness of the method proposed is verified by the free field model and by the soil-structure interaction model. The method proposed is also suitable for the seismic analysis of large buildings such as bridges, tunnels, and dams.