In order to study particle rotary motion behavior and its mixing effect, five kinds of different speeds and fitted the mathematical model of particle mixing data applying to EDEM and MATLAB were stimulatedwith the model of Rotary mixing equipment and based on the theory of DEM simulated the. The virtual experiments predicted the best speed. The results showed that the virtual experiments not only could research particle cyclotron motion characteristics of the curve distribution, but also the method of DEM was conducive to study the mixing mechanism. Compared with the five speeds, the degree of mixing was 62.27%, closed to its optimal mixing degree (56.426%). And the relative error was 5.846%. The research provided the ideas and methods for design of discrete material mixing equipment.