Edge folding machine for packaging box processing

The utility model discloses an edging machine for packing box processing, which comprises a base and a main machine, the main machine is fixedly connected to the rear side of the top of the base, the front side of the top of the base is fixedly connected with a shell, the rear side of the shell is provided with a limiting assembly, the front side of the shell is provided with a first through hole, the first through hole is provided with a pull rod, and the pull rod is provided with a first through hole. And the front side of the pull rod is fixedly connected with a cross rod. Through cooperative use of a shell, a limiting assembly, a first through opening, a pull rod, a cross rod, a position control column and a positioning assembly, the pull rod is pulled forwards to drive the cross rod to move, the cross rod drives the position control column to move, the position control column drives position control pieces on the two sides to move in the opposite directions, and the position control pieces drive moving p