In order to improve the penetration power of projectile,the armor-piercing performance of 30mm projectile with a toughened TC warhead to the multilayer A3 steel plates targets was experimentally researched under DOP method,and the projectile was compared to the standard projectile.The impact-dynamic formula was applied,and the sudden impact pressure of ceramic plates shocked by TC composite projectiles and the standard projectiles was calculated and compared.The effects of warhead structures and materials on armor-piercing performance to the multilayer A3 steel plates targets were analyzed and compared.Under the same conditions,the aperture,the depth of perforation and the residual mass of bullet core on the armor plates of TC composite projectiles were compared with those of the standard projectiles.The penetration process was simulated by ANSYS/LS-DYNA,and the simulation results were compared with the test results.Combined with the simulation results,the penetration performance was further analyzed in terms of the leaving velocity and the residual mass of bullet core.The results show that the TC warhead has a great effect on the protection of bullet core,and the study offers a foundation for ceramic applied in other warheads.