An organic electroluminescent device comprises an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode, which are stacked in sequence. The electron injection layer is composed of a first ferric salt layer, a ternary doped layer, and a second ferric salt layer. The first ferric salt layer and the second ferric salt layer are made of at least one material selected from ferric chloride, ferric bromide and ferric sulfide. The ternary doped layer is composed of a bipolar metal oxide material, a luminescent material and zinc powder. The bipolar metal oxide material includes at least one selected from molybdenum trioxide, tungsten trioxide and vanadium pentoxide. The luminescent material includes at least one selected from 4-(dinitrile methyl)-2-butyl-6-(1,1,7,7-tetramethyljulolidine-9-vinyl)-4H-pyrans, 9,10-di-beta-naphthylene anthracene, 4,4'-bis(9-ethyl-3-carbazole vinyl)-1,1'-biphenyl and 8-hydroxyquinoline aluminum.