Structure for preventing wallboard patterns at two ends of cylinder

A structure for preventing wallboard patterns at the two ends of a cylinder is characterized in that cylinder plugs are fixedly connected to the two ends of a cylinder roller body respectively; an annular groove is machined in the end face of the side, close to the cylinder circular wall plate, of the cylinder plug, and the inner ring face of the outer ring groove wall of the annular groove is of a horn-mouth-shaped structure. An annular sealing disc which is in clearance fit with the groove wall and the groove bottom of the annular groove is fixedly installed on the inner side face of the cylinder circular wall plate. A fit clearance between the annular groove and the annular sealing disc forms an airflow channel with pressurizing and air uniformizing functions; a clearance fit slit structure is adopted between the end surface of the outer ring groove wall of the annular groove of the cylinder plug and the matching surface of the cylinder circular wallboard; a circular wall plate air inlet communicated with