The invention discloses an organic electroluminescent device which comprises an anode, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode. The anode and the cathode are arranged oppositely. The hole transport layer is formed between the anode and the light-emitting layer. The light-emitting layer is formed between the hole transport layer and the electron transport layer. The electron transport layer is formed between the light-emitting layer and the cathode. The light-emitting layer comprises a red light-emitting layer, a green light-emitting layer and ablue light-emitting layer. The red light-emitting layer and the green light-emitting layer are arranged adjacent to each other, and are formed on the blue light-emitting layer. The blue light-emitting layer is a blue light quantum dot layer. The blue light quantum dot layer is used as the blue light-emitting layer. The problem of reduced blue light efficiency, which is caused by the fact that thethickness of the blue light-emitting layer of a traditional organic electroluminescent device is directly reduced, is effectively solved.