Edge gluing device

The utility model relates to the technical field of paper bag processing, in particular to an edge gluing device which comprises a workbench, inserting grooves are symmetrically formed in the upper end of the workbench, a threaded rod is installed at the center in the workbench in a threaded mode, a threaded ring is fixedly arranged on the surface of the threaded rod in a sleeved mode, and U-shaped frames are installed in the two inserting grooves in a sliding mode. Springs are fixedly installed between the two U-shaped frames and the workbench. Transverse rods are fixedly mounted at the upper ends of the two U-shaped frames, and first sliding grooves are formed in the upper ends of the two transverse rods; the opposite ends of the two inner blocks are provided with limiting grooves, the threaded rings are movably arranged in the two limiting grooves, pressing strips are fixedly installed on the side walls of the opposite sides of the two transverse rods, a glue storage box is arranged at the upper end of the