Sectorial target test method is mainly used to measure killing radius, the principle is that the projectile is placed vertically, 6 targets with the central angle of 60° are placed according to different distance, the projectile's killing radius can be calculated through statistical result of fragments hitting target. Sector target test result is theoretically equivalent to axially 90° state in projectile synthetic power test, the distance is the killing radius when the kill probability is 0.632. Lethal radius results can be obtained by analyzing the projectile synthetic power test data with no need to conduct sector target test again.