An organic light-emitting display device, comprising: a substrate; a first electrode with reflective characteristic; a second electrode with semi-transparent semi-reflective characteristic; a light output coupling layer, disposed on the second electrode; and an organic layer, disposed between the first electrode and the second electrode, and comprising a hole injection layer, a hole transport layer, a light-emitting layer and an electron transport layer, wherein, the hole injection layer is adjacent to the first electrode and disposed on the first electrode, the light-emitting layer comprises a red-light emitting layer, a green-light emitting layer and a blue-light emitting layer respectively disposed in a red pixel area, in a green pixel area and in a blue pixel area, the organic light-emitting display device further comprises an optical compensation layer disposed between the hole injection layer and the hole transport layer, characterized in that, the optical compensation layer is provided only in the green pixel area and in the red pixel area, and the optical compensation layer has a structure with at least two tiers, the optical compensation layer in the green pixel area comprises a first optical compensation tier and a second optical compensation tier, wherein a difference value of the highest occupied molecular orbital energy level of the first optical compensation tier minus the lowest unoccupied molecular orbital energy level of the second optical compensation tier is ≥-0.2eV, the optical compensation layer in the red pixel area comprises a first optical compensation tier and a second optical compensation tier, wherein a difference value of the highest occupied molecular orbital energy level of the first optical compensation tier minus the lowest unoccupied molecular orbital energy level of the second optical compensation tier is ≥-0.2eV. a substrate; a first electrode with reflective characteristic; a second electrode with semi-transparent semi-reflective characteristic; a light output coupling layer, disposed on the second electrode; and an organic layer, disposed between the first electrode and the second electrode, and comprising a hole injection layer, a hole transport layer, a light-emitting layer and an electron transport layer, wherein, the hole injection layer is adjacent to the first electrode and disposed on the first electrode, the light-emitting layer comprises a red-light emitting layer, a green-light emitting layer and a blue-light emitting layer respectively disposed in a red pixel area, in a green pixel area and in a blue pixel area, the organic light-emitting display device further comprises an optical compensation layer disposed between the hole injection layer and the hole transport layer, characterized in that, the optical compensation layer is provided only in the green pixel area and in the red pixel area, and the optical compensation layer has a structure with at least two tiers, the optical compensation layer in the green pixel area comprises a first optical compensation tier and a second optical compensation tier, wherein a difference value of the highest occupied molecular orbital energy level of the first optical compensation tier minus the lowest unoccupied molecular orbital energy level of the second optical compensation tier is ≥-0.2eV, the optical compensation layer in the red pixel area comprises a first optical compensation tier and a second optical compensation tier, wherein a difference value of the highest occupied molecular orbital energy level of the first optical compensation tier minus the lowest unoccupied molecular orbital energy level of the second optical compensation tier is ≥-0.2eV.