Plug-in box locking device

The utility model discloses a plug-in box locking device. The plug-in box locking device comprises a box body and a plug-in box slidably arranged in the box body. A first rotating wheel and a second rotating wheel are rotatably arranged on the two sides of the insertion box respectively; a sliding rail groove is formed in the inner side of the box body; the first rotating wheel and the second rotating wheel are located in the sliding rail groove. An arc-shaped groove is formed in the side face of the box body, a first limiting column is movably arranged on the side face of the box body, a crank is rotatably arranged on the outer side of the box body, a second limiting column is connected to the crank, and at least part of the second limiting column penetrates through the arc-shaped groove and extends into the box body; the second rotating wheel is located between the first limiting column and the second limiting column. The problems that according to a plug-in box fixing structure device in the prior art, a p