In order to study the damage effects of underwater explosion, underwater explosion of GUHL-1 was tested, the shock wave peak overpressure at different distance were obtained. And the relation between shock wave peak overpresure and distance of underwater explosion for GUHL-1 was obtained by calculation.Meanwhile, the effects of damage to the different frogman weapons system were analyzed. The study provided the reference for design of anti-frogman weapons systems in the future.