An organic light-emitting diode, comprising: a base substrate; a first electrode and a second electrode disposed on the base substrate; a first light-emitting layer disposed between the first electrode and the second electrode; a hole transport layer disposed between the first electrode and the first light-emitting layer; a charge generation layer disposed between the first light-emitting layer and the second electrode; and a second light-emitting layer disposed between the second electrode and the charge generation layer; wherein the charge generation layer comprises a first connection layer, a carrier injection layer, and a second connection layer which are stacked in sequence, the first connection layer comprises an electron transport material doped with a hole blocking material, and the second connection layer comprises a hole transport material doped with an electron blocking material; the charge generation layer is in direct contact with both the first light-emitting layer and the second light-emitting layer, the first light-emitting layer comprises a red light-emitting layer and a green light-emitting layer that are disposed in a same layer, the second light-emitting layer is a blue light-emitting layer; and a surface of the first light-emitting layer closer to the base substrate and a surface of the charge generation layer closer to the base substrate are in a same plane, and the surface of the charge generation layer closer to the base substrate is in direct contact with the hole transport layer; and wherein the carrier injection layer comprises anthracene derivatives, aromatic diamine compounds, triphenylamine compounds, aromatic triamine compounds or biphenyl diamine derivatives doped with Al, Ca, Mg, Ag, Au, Na, K, Cs or Li. a base substrate; a first electrode and a second electrode disposed on the base substrate; a first light-emitting layer disposed between the first electrode and the second electrode; a hole transport layer disposed between the first electrode and the first light-emitting layer; a charge generation layer disposed between the first light-emitting layer and the second electrode; and a second light-emitting layer disposed between the second electrode and the charge generation layer; wherein the charge generation layer comprises a first connection layer, a carrier injection layer, and a second connection layer which are stacked in sequence, the first connection layer comprises an electron transport material doped with a hole blocking material, and the second connection layer comprises a hole transport material doped with an electron blocking material; the charge generation layer is in direct contact with both the first light-emitting layer and the second light-emitting layer, the first light-emitting layer comprises a red light-emitting layer and a green light-emitting layer that are disposed in a same layer, the second light-emitting layer is a blue light-emitting layer; and a surface of the first light-emitting layer closer to the base substrate and a surface of the charge generation layer closer to the base substrate are in a same plane, and the surface of the charge generation layer closer to the base substrate is in direct contact with the hole transport layer; and wherein the carrier injection layer comprises anthracene derivatives, aromatic diamine compounds, triphenylamine compounds, aromatic triamine compounds or biphenyl diamine derivatives doped with Al, Ca, Mg, Ag, Au, Na, K, Cs or Li.