The present application discloses an organic light-emitting display panel and a driving method thereof, as well as an organic light-emitting display device. A specific implementation of the organic light-emitting display panel comprises: an array arrangement comprising a plurality of pixel units, a plurality of data lines and a plurality of reference signal lines, wherein each pixel unit comprises a first subpixel, a second subpixel and a third subpixel, and a color of the first subpixel, a color the second subpixel and a color of the third subpixel differ from one another; a pixel driving circuit is formed in each subpixel, and comprises a driving transistor and an organic light-emitting diode; and the first subpixel, the second subpixel and the third subpixel of an identical pixel unit are electrically connected with a given reference signal line.