Multifunctional packaging box

The utility model discloses a multifunctional packaging box which comprises a box body, a box cover is hinged to the top side of the box body, adjusting seats are fixedly bonded to the inner walls of the two sides of the box body, gears are rotationally installed in inner cavities of the adjusting seats, two racks are connected to the gears in a meshed mode, sliding blocks are fixedly bonded to the side walls of the two racks, and the sliding blocks are connected with the adjusting seats in a meshed mode. The outer ends of the sliding blocks are rotationally connected with push-pull rods, and one ends of the two push-pull rods are rotationally connected with the same clamping plate. When the clamping device is used, the top side rack can be driven to move by pushing the moving block to slide in the second through groove, the top side rack drives the bottom side rack to synchronously and oppositely move through the gear, and the two racks can drive the two sliding blocks to move when moving, so that the two pu