Abstract: To investigate the penetration response of ultra-high molecular weight polyethylene (UHMWPE) laminated plates under oblique projectile impacts, ballistic impact experiments at impact angles of 0°, 10°, and 20° were carried out. Firstly, the dynamic response was studied based on high-speed photography, and the failure form was analyzed after impact experiments. And then, a 3D finite element calculation model was constructed and validated with experiment results to analyze its reliability and the mechanism of UHMWPE laminated plates at different impact angles. The results show that, impacting with a flat cobra under projectile penetration, the laminated plate fiber can occur easily intension failure around projectile nose due to the stress concentration resulted from local contact increases. However, increased the equivalent thickness of the laminated plates and the contact area between the projectile and the laminate resulted in projectile deflection, the method can also make the influence of impact angle directly to relate with projectile impact speed. At low impact velocities, the penetration resistance can decrease with increasing impact angle. Contrarily, when the impact velocity of the ballistic is arranged to exceed greatly its limit, the penetration resistance can increase with the impact angle.