Abstract: In order to find the best kinematical parameters (amplitude, frequency, vibrating direction angle), to improve efficiency and reduce the loss, vibration screening process simulation was carried out by EDEM software. Simulation results showed that, as amplitude and frequency increased, longitudinal moving speed of the material and efficiency of the material passing through screen increased; the screening loss occurred at amplitude 40 mm and frequency 6 Hz. Within 25° to 45° range, longitudinal moving speed of the material increased as vibration direction angle increased, the maximum velocity was occurred at 45°; When vibration direction angle exceeded 45°, longitudinal moving speed of the material gradually decreased; Efficiency of the material passing through screen was the highest at 35°, which then gradually reduced with the vibration direction angle increased after 35°. Comparison of measured value with simulated value demonstrated adequate agreement. The numerical simulation by using EDEM has correctness and feasibility.