The sapphire single crystal plate with size of 485 mm×985 mm×12 mm was successfully prepared by a largesize edgedefined filmfed growth (EFG) furnace designed and developed independently. After cutting and grounding, the crystal was formed into transparent armors composited with glass and polycarbonate. The surface density with the size of 352 mm×351 mm×33 mm is 79.27 kg/m2, and the surface density of the other is 79.38 kg/m2 with the size of 351 mm×342 mm×33 mm. Targeting tests were conducted on the transparent armors using incendiary shells with diameters of 7.62 mm and 12.7 mm, respectively. The experimental results show that the transparent armor based on sapphire crystal plate has excellent impact resistance during firing at a normal angle of 0° and with a distance of 100 m which from target to the armors.