This disclosure provides an OLED light-emitting device, a production method thereof as well as a display apparatus, and relates to the technical field of OLED display, which can enhance the internal quantum efficiency of a blue OLED light-emitting device. This OLED light-emitting device comprises a substrate, and an anode, a hole transport layer, a blue light-emitting layer and a cathode provided on the substrate; the OLED light-emitting device further comprises an Ag nanolayer located between the anode and the hole transport layer; wherein the blue light-emitting layer is a blue phosphorescent light-emitting layer; the absorption spectrum of the Ag nanolayer overlaps the emission spectrum of the blue phosphorescent light-emitting layer, and the blue phosphorescent light-emitting layer is located within the penetration depth of surface plasma of Ag nanoparticles in the Ag nanolayer. It is used in the production of a blue OLED light-emitting device and a display apparatus comprising the same.