Paper aligning structure for printing machine

The utility model discloses a paper aligning structure for a printing machine, which belongs to the field of printing machines and comprises a bottom plate, electric sliding tables are fixedly connected to four corners of the upper end of the bottom plate, electric sliding blocks are movably connected to the inner sides of the electric sliding tables, and a printing machine body is fixedly connected to the upper ends of the electric sliding tables. A control panel is arranged in the middle of the front end of the printing machine body, a vibration assembly is fixedly connected to the inner side of the electric sliding block and comprises a vibration tray, paper can be stacked at the upper end of a bearing disc, the bearing disc is placed at the upper end of the vibration tray, and the vibration tray can be driven to shake left and right to generate vibration by starting an eccentric assembly; and the inclined alignment mechanism is controlled to move towards the inner side, and the stacked paper is folded inw