Abstract: The silicon carbide ceramics (SiC) and ultra-high molecular weight polyethylene fiber reinforced waterborne polyurethane composite laminate (UHMWPE/WPU) were used to prepare SiC-UHMWPE/WPU composite armor plate by resin film infusion. Based on ballistic impact test, the influence of structural parameters of the composite armor plate on the anti-penetration performance of armor-piercing projectile was investigated. The damage mode of the post-impact SiC-UHMWPE/WPU composite armor plate, which was repeatedly impacted by type-53 and 7.62 mm armor piercing projectile at a velocity of (808_-8^+7) m/s, was investigated by the X-ray computed tomography (CT) technology. The results show that the anti-multiple penetration performance of SiC-UHMWPE/WPU composite armor plate decreases gradually with the reduction of UHMWPE/WPU thickness or SiC thickness. Significantly, 10 mm-thick SiC+13 mm-thick UHMWPE/WPU may be the best engineering application structure to resist the multiple ballistic penetration of type 53 and 7.62 mm armor piercing projectile in the test. The reduction of area density of UHMWPE/WPU not only affects the protection efficiency of UHMWPE/WPU, but also indirectly affects the protection efficiency of ceramics via decreasing the support effect. Moreover, the damage modes of post-impact composite armor plate include SiC fragmentation, interface failure between SiC and UHMWPE/WPU, adiabatic shear failure, tensile deformation and delamination failure of UHMWPE/WPU.