Printing roller convenient to install and used for printing machine

The utility model relates to the field of printing, in particular to a convenient-to-install printing roller for a printing machine, which comprises a printing machine main body, supporting frames are fixedly installed at the left end and the right end of the bottom end of the printing machine body correspondingly, connecting pieces are movably installed in the supporting frames through bearings, a rotating shaft is arranged at the lower end of the printing machine body, the rotating shaft is inserted into the connecting pieces, and a printing roller body is installed outside the rotating shaft. A supporting plate is arranged on the side, away from the corresponding rotating shaft, of the interior of each connecting piece, one side of each supporting plate is attached to the other side of the corresponding rotating shaft, and hinge rods are movably installed at the upper end and the lower end of the other side of each supporting plate through bearings. The problem that the printing roller body is inconvenient