In this paper, the influence of the composite order of the composite plate on the ballistic characteristics of the composite plate was studied in a series of projectile velocities. The models of the projectile penetrating target under two different composite sequences were established, and the numerical simulation of the projectile penetrating target was performed by using the display dynamic analysis software ANSYS/LS-DYNA. The ballistic characteristics of the two models were analyzed and compared, thereby the law that the anti penetration ability of the composite plate changed with the composite order and the projectile velocity was derived. The results of numerical analysis had certain reference value for improving the anti penetration ability of the composite armor.