An organic light emitting display panel, having at least a pixel unit structure comprising three pixel structures: a red pixel structure, a green pixel structure, and a blue pixel structure; wherein each pixel structure comprises an active matrix driving circuit, and at least two organic light emitting devices connected in series which are connected to the active matrix driving circuit, wherein the at least two organic light emitting devices compose an organic light emitting device group, and the active matrix driving circuit drives the at least two organic light emitting devices connected in series to emit light, wherein, for each said red, green and blue pixel structures, all the organic light emitting devices connected in series are red organic light emitting devices, green organic light emitting devices and blue organic light emitting devices, respectively, wherein, for each pixel unit structure, grid scan lines and data signal lines are connected to the active matrix driving circuits, wherein, in each pixel unit structure, the number of the red organic light emitting devices is larger than the number of the blue organic light emitting devices, and the number of the green organic light emitting devices is larger than the number of the blue organic light emitting devices, according to the working voltages of the organic light emitting devices of different colors; characterized in that, the active matrix driving circuit comprises a first end and a second end, the first end is coupled to a first reference voltage source, the second end is coupled to a second reference voltage source, the at least two organic light emitting devices connected in series are disposed on the first end or the second end of the active matrix driving circuit, wherein when the at least two organic light emitting devices connected in series are disposed on the first end or the second end of the active matrix driving circuit, an anode of one organic light emitting device is electrically connected to a cathode of an adjacent organic light emitting device; when the at least two organic light emitting devices connected in series are disposed on the first end or the second end of the active matrix driving circuit, the at least two organic light emitting devices connected in series comprise: a substrate; a first anode and a second anode arranged at the same layer on the substrate; a first organic light emitting layer and a second organic light emitting layer arranged at the same layer on the first anode and the second anode respectively; a first cathode and a second cathode arranged at the same layer on the first organic light emitting layer and the second organic light emitting layer respectively; a first insulating layer and a second insulating layer are arranged opposite to each other and between the first organic light emitting layer and the second organic light emitting layer, and there exists a gap between the first insulating layer and the second insulating layer; the first anode and the second cathode extend into the gap, and the second cathode is directly electrically connected to a portion of the first anode extending into the gap; or the at least two organic light emitting devices connected in series comprise: the substrate; the first cathode and the second cathode arranged at the same layer on the substrate; the first organic light emitting layer and the second organic light emitting layer arranged at the same layer on the first cathode and the second cathode respectively; the first anode and the second anode arranged at the same layer on the first organic light emitting layer and the second organic light emitting layer respectively; a first insulating layer and a second insulating layer are arranged opposite to each other and between the first organic light emitting layer and the second organic light emitting layer, and there exists a gap between the first insulating layer and the second insulating layer; the first cathode and the second anode extend into the gap, and the second anode is directly electrically connected to a portion of the first cathode extending into the gap.