The invention discloses a switch cabinet grounding wire clamp. The switch cabinet grounding wire clamp comprises an insulating operation rod (1) and a hook assembly (3); an elastic clamp (2) is arranged at one end of an insulating sleeve (1); the size of the elastic clamp (2) is corresponding to the pipe diameter of the insulating sleeve (1); the hook assembly (3) is positioned in the elastic clamp (2) and detachably connected with the insulating sleeve (1); a stop ring (4) is arranged in the connecting position of the hook assembly (3) and the insulating sleeve (1); and the hook assembly (3)is connected with a high-voltage grounding wire (5) and a low-voltage grounding wire (6). The switch cabinet grounding wire clamp is wide in applicable range and high in grounding protection effect.