Limiting device for preventing plug-in box from disengaging

The utility model discloses a limiting device for preventing a plug-in box from disengaging. The limiting device is used for the plug-in box supported by a bracket and comprises a handle, a limiting structure, a first shaft, a first torsion spring, a limiting block, a second shaft, a support, a stop dog and a steel wire rope, wherein the handle is installed on the panel of the plug-in box, the limiting structure is installed on the base plate of the plug-in box and moves along with the plug-in box along the bracket, the first shaft is installed on the limiting structure, the limiting block penetrates through the first shaft and is installed on the side, close to the bracket, of the limiting structure, the first torsion spring penetrates through the first shaft, one end of the first torsion spring is fixed to the limiting structure, and the other end of the first torsion spring is connected with the limiting block; the second shaft is installed on the handle, and the support penetrates through the second shaft