Abstract: Abstract：In order to study the effect of vibration parameters of vibratory bed surface on mass flow rate of material and the effect of throwing strength on the particles velocity layering, using EDEM software to simulate and analyze the influence of influence of amplitude, frequency and vibrating direction angle on the bed particles and the average speed of throwing strength on particle speed stratification. The results show that the mass flow rate of the material is approximately linear with the amplitude and frequency, and has a nonlinear relationship with the vibration direction angle, and the influence of amplitude, vibration direction angle and frequency on material mass flow rate decreases. The velocity of particle group is distributed in a gradient along the height direction, and increases with the increase of throwing strength. The influence of the throwing strength is more obvious when the material is closer to the bed.