Based on the analysis of the structure and the working principles of the vertical shaft impact crusher, set up the three-dimensional modeling of the rotor in Solid Works. Through the importation of the 3D model into ADAMS for the dynamic simulation, simulated the throwing process of the materials when the crusher was in operation, then gotten the variation of the biggest and average impact force suffered by the rotor in different spindle speeds. Thus, reducing the value of the biggest impact and frequency need to consider both the structure of the rotor and the optimization of the related parameters and the impact of the feed particles uniformality. Simulation results show that the speed of the rotor is an important factor that impacts the crushing quality and efficiency of the vertical shaft impact crusher, but the crushing effect is not always rising with the speed increasing. 1450-1750 r/min is the speed range of the rotor, between which the rotor suffers balanced force and can gain stable operation. In addition, on reducing the value and frequency of the greatest impact, for one thing, the rotor structure and the optimization of the relevant parameters need to be taken into consideration, for another, the impact of the uniformity of the feed particle size should also be analyzed.