Limiting mechanism of vertical box locking machine

The utility model relates to the field of box locking machines, and discloses a limiting mechanism of a vertical box locking machine, which comprises a vertical machining table, the box locking machine, a control panel, two limiting angle plates and two limiting assemblies, the box locking machine is fixedly arranged on the vertical machining table, the control panel is arranged on the vertical machining table in a sliding manner, and the limiting angle plates are arranged on the control panel. The two limiting angle plates are slidably mounted on one side of the control plate, the limiting assemblies are arranged on the corresponding limiting angle plates, sliding blocks are fixedly mounted on one sides of the two limiting angle plates, two sliding grooves are formed in one side of the control plate, and the sliding blocks are slidably mounted in the corresponding sliding grooves. Second threaded holes are formed in one sides of the two sliding blocks correspondingly, and second lead screws are rotationally