In this paper, the finite element method with 6-node pentahedral elements will be applied to simulate the strong ground motion due to the Lushan earthquake fault dynamic rupture. In order to approximate the geophysics conditions in the region near the Lushan earthquake structure and the frictional fact along the Lushan earthquake fault plane, the layer model with different P and S wave velocities and the slip-weaken constitutive will be considered in the construction of finite element model corresponding to the Lushan earthquake fault. For validating the lastly computational result, the comparison between the calculation results and the stations records will be carried out. Basing on the above research achievements, the theoretical ground motion maps for the variation of east-west velocity component of ground motion in the earthquake process will be shown. Furthermore, for studying the correlations between the ground motion and the distribution of landslides brought by Lushan earthquake, we will simply analyze and summary the temporal and spatial distribution of ground motion caused by the Lushan earthquake. Just as the record data shown, the simulation result also shows the effect of hanging wall of fault is not so obvious, which maybe stems from the special characters of motion of blind-thrust fault during the earthquake rupture process.

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