Paper feeding device for printer

The utility model relates to a paper feeding device for a printing machine. The utility model belongs to the technical field of printers, the printing machine comprises a plurality of printing machinebodies, a conveying device is arranged between every two adjacent printing machine bodies. Two opposite mounting plates are arranged between the adjacent printing machine bodies; the conveying devicecomprises a motor, a driving roller and a driven roller which are in driving connection with the mounting plate, and a plurality of conveying belts sleeved with the driving roller and the driven roller; an output shaft of the motor is coaxially connected with one end of the driving roller; a supporting plate is fixed to the side, deviating from the conveying belt, of each mounting plate; the upper end face of the supporting plate is rotationally connected with a rotating shaft perpendicular to the upper end face of the supporting plate. A gear is coaxially connected to the outer circumferential face of the rotating sh