Printing color register cylinder

The utility model discloses a printing color register cylinder, relates to the technical field of printing color register, and aims to solve the problems that the existing printing plates in the prior art are mostly controlled by cylinders, and after the traditional cylinders are used for a long time, the calibration accuracy of the cylinders is deviated, so that the positions of characters on two plates are not accurately calculated during engraving, and the printing quality is influenced. And the printed characters with two colors are uneven and cannot be read. A suspension shaft is arranged at one end of the main valve air cylinder, an end closing shaft is arranged at the other end of the main valve air cylinder, the suspension shaft and the end closing shaft are connected with the main valve air cylinder through bolts, a wire inlet sleeve is arranged on the outer side of the end closing shaft, the wire inlet sleeve is connected with the end closing shaft through a clamping groove, and an extension shaft r