Plastic bag printing mechanism

The utility model discloses a plastic bag printing mechanism, which relates to the technical field of plastic bag printing and particularly comprises a working box, a positioning plate is placed in the middle of the front side of the top of the working box, a groove is formed in the top of the positioning plate, and a positioning roller is fixedly connected in an inner cavity of the groove through a spring. A first hydraulic rod is embedded in the middle of the rear side of the top of the working box, a supporting plate is fixedly connected to the top of the first hydraulic rod, and a lead screw is movably connected to the middle of the top end of the supporting plate. According to the plastic bag printing mechanism, the drying structure is arranged, a first rotating motor rotates to drive an air blowing plate to rotate, when the air blowing plate moves to the position above a plastic bag, an air blower works to enable a spray head embedded in the air blowing plate to spray air, the sprayed air is blown to th