Packaging bag printing machine with drying structure

The utility model discloses a packaging bag printing machine with a drying structure, which relates to the technical field of printing equipment and comprises a drying box, a clamping component is mounted on one side of the drying box, the drying box is fixedly mounted on the printing machine through the clamping component, and inlet and outlet grooves are formed in opposite side surfaces of the drying box and are communicated with the inside of the drying box. A plurality of transmission rollers are rotationally connected between the opposite inner walls of the drying box through bearings and distributed in a circular array mode. Heat in tail gas exhausted by the heat exchange pipe can be better conducted to fresh dry air passing through the interior of the air inlet pipe through the spiral blades, the dry air is heated preliminarily, waste of the heat in the tail gas after the printing packaging bag is dried is reduced, the circulation path of the tail gas can be prolonged through the arrangement of the spi