Printing plate feeder

The utility model relates to the field of printing machine feeding, and discloses a printing plate feeder which comprises a base, housings are arranged on the two sides of the base, an air suction mechanism used for sucking up a printing plate is arranged between the two housings, and an air blowing mechanism used for blowing up the printing plate is arranged between the two housings. A swing mechanism used for conveying printing plates is arranged between the two housings and comprises a swing rotating shaft, a swing arm, a first lifting part and a first air nozzle, the two ends of the swing rotating shaft are rotationally arranged on the housings, the swing arm is arranged on the swing rotating shaft, and the first lifting part is arranged on the side, away from the swing rotating shaft, of the swing arm. The first air nozzle is arranged on the side, away from the swing arm, of the first lifting piece. The air cylinder swing device has the effect that the problem that the working efficiency of a feeder is l