Abstract: In order to research the stratification more intuitively and improve the screening efficiency as well as capacity of vibrating screen, compared with the dist ribution of the particles for three kinds of typical stratification configurations, the paper proposed the stratification sedimentation coefficient to evaluate the quality of str atification. Using the discrete element method ( DEM) to simulate and analyze the screening process. The influence of vibration parameters ( vibration frequency, swing frequency, swing angle, vibration direction angle and amplitude) on the stratification sedimentation coefficient in the screening process was studied. The results show w hen the vibration frequency is 18 Hz, the swing frequency is about 10 Hz, the swing angle is about 0.5 degrees, the vibration direction angle is 36 degrees, and the amp litude is 2.1 mm, the quality of stratification is the best and the stratification configuration is the most suitable for the screening.