The lever is installed in the center of the main lock body seat by a short pin and a spring and can rotate around the short pin. Its two ends are matched with the lock core and the lower lock tongue respectively. The lower lock tongue is located on the inner side of the lever and can be moved down by the lever. Sliding up and down in the vertical direction, the upper end of which is an inclined surface and slides up and down in the vertical direction under the lever toggling in the upper lock tongue. The upper end is an inclined surface and is matched with the inner end of the upper lock tongue, and its lower end extends into the lock pin hole and Cooperate with the lock pin head, the upper lock tongue is installed above the lower lock tongue through a compression spring and can move left and right in the horizontal direction. Its inner end has an oblique opening and cooperates with the upper end of the lower lock tongue, and its outer end extends into copper In the head hole and matched with the copper head of the steel cable, the auxiliary lock body is composed of the auxiliary lock body seat, the lock tongue, the top pin and the lock pin sleeve. The auxiliary lock body seat is riveted to the other end of the lock plate, and the upper part of the auxiliary lock body is riveted to the other end of the lock plate. The copper head hole that cooperates with the copper head of the steel cable, the lock tongue is installed behind the copper head hole through the compression spring and can move back and forth in the horizontal direction, and its front end extends into the copper head hole and cooperates with the copper head of the steel cable. The rear end has an oblique opening and is matched with the upper end of the top pin. The top pin is installed under the lock tongue through a compression spring and can move up and down in the vertical direction. Its upper end is a bevel and cooperates with the rear end of the lock tongue, and its lower end extends The auxiliary lock body seat is outside and matched with the lock pin sleeve. The lock pin sleeve is installed on the lower right of the auxiliary lock body seat through a pin shaft and can rotate around the pin shaft. A reset spring is installed on the pin shaft. The center of the lock pin sleeve is a through hole. The lock pin is a long round rod, which is sleeved in the central through hole of the lock pin sleeve through a compression spring and can slide in it. One end of the lock pin is provided with a lock that cooperates with the lock pin hole on the main lock body seat and the lower end of the lower lock tongue. The pin head has a handle at the other end, and the two ends of the steel cable are each provided with a copper head that cooperates with the copper head holes on the main and auxiliary lock body seats respectively, and a steel wire clamp is installed on the copper head.