Reusable anti-opening plug block for elevator triangular lock

The invention discloses a reusable anti-opening plug block for an elevator triangular lock. The reusable anti-opening plug block for the elevator triangular lock is provided with a body and a metal cover; the body is cylindrical; the metal cover is connected to the cylindrical surface of one end of the body in a threaded mode; three clamping walls arranged in a regular triangle shape are arrangedin an opening; a space for containing a triangular lock cylinder is formed among the clamping walls; the inner side of each clamping wall is provided with a clamping rib; the clamping ribs make contact with the side face of the triangular lock cylinder; and the metal cover is provided with a through hole allowing a disassembling tool to penetrate through. The reusable anti-opening plug block for the elevator triangular lock is plugged into a gap of the triangular lock, and plugging of the triangular lock when the triangular lock is not used is achieved through interference fit between the clamping ribs in the plug blo