Abstract: To explore the strong motion characteristics of the Zemuhe fault and provide reasonable ground motion input for the seismic design of the cross-fault Heishuihe Bridge, the near-field strong ground motions of the Zemuhe fault were simulated by using a finite-fault modeling approach, with the help of the deterministic physics-based simulation that can explicitly describe the fault rupture process at the source, the propagation of the resulting seismic waves, and the effects of local site conditions. Results show that the simulated motions agree well with empirical models in terms of peak value and spectra. The higher PGA in the parallel-fault direction and the PGV in the horizontal direction are mainly concentrated in the hanging wall of the fault, indicating a significant hanging-wall effect. In the perpendicular fault direction, higher PGV and PGD mainly appear at both ends of the fault. Pulse-like motions can lead to significant long-period amplification of ground motion. The method can effectively capture the directionality and fling-step effects of near-fault ground motions and provide a reliable basis for ground motion input in the seismic design of major projects.