Abstract: Open-pit mining vibrations can cause dump slope amplification. This paper uses numerical simulation with peak ground acceleration amplification factors as the index. It analyzes vibration wave transmission in the dump slope and the influence of slope physical-mechanical parameters and vibration wave parameters on the amplification effect. Results show that as the vibration wave propagates upward in the slope, the amplification effect grows with elevation, peaking at the surface, especially at the crest platform-slope surface junction. Slope and vibration wave parameters affect the amplification. An increase in internal friction angle, vibration wave frequency and amplitude weaken the amplification, while an increase in bench height strengthens then weakens it. Cohesion change has little effect. The findings support determining key reinforcement positions and stability monitoring of mine dumps.