Abstract: In order to strengthen the stratification of mixed particles on the screen surface and improve the screening effect of traditional vibrating screens. Based on the void-filling effect of mixed particles under vibration and based on the Lissajous vibration synthesis theory, a composite vibrating screen is proposed. The theoretical basis and working principle of the composite vibrating screen are explained and verified using the discrete element method. A comparative study of conventional vibrating screen and composite vibrating screen discrete element simulation was carried out with composite, linear, elliptical and circular vibrating screens with frequency, amplitude and vibration direction angle as variables, and the comparison results showed that the composite vibrating screen has more significant advantages in both screening efficiency and material handling. A composite vibrating screen can give the particle an excitation force along the width of the screen surface, the particle in xyz three directions has the effect of excitation force; the particle force is more diversified, the mixed particle system is looser, more active, better stratification effect, and thus the composite vibrating screen can achieve ideal screening effect.