Abstract: In order to study the penetration process and influencing factors of long rod projectile(LRP) obliquely impacting ceramic composite targets, the experiment of tungsten alloy LRP obliquely penetrating ceramic/metal composite target was carried out. The influence of velocity, impact angle of LRP, thickness of ceramic, thickness of cover plate and back target on the protective performance of the ceramic was analyzed by numerical simulations. The results show that the protection coefficient of the ceramic composite target increases with the increase of the projectile velocity at the impact velocity of 1100~1300 m/s. When the impact angles of projectile range from 0° to 60°, the protective performance of the ceramic is the poorest when the angle is 30°. When the ratios of cover plate thickness and projectile diameter are 1/3、 2/3 and 1, the protection coefficient of ceramic composite target increases linearly and then decreases slowly. When the ratio of ceramic thickness and projectile diameter is 11/3 and the ratio of cover plate thickness and projectile diameter is 1/3, the protection coefficient is the greatest. When the projectile obliquely penetrates the ceramic composite armor while retaining the areal density of ceramic composite armor, the residual velocity of the projectile decreases, and the decreasing velocity increases gradually with the increase of the impact angle of the projectile; the residual velocity of the projectile increases with the increase of the cover thickness.