A flexible organic light-emitting diode (OLED) display and a method for manufacturing the same are provided. The method includes: forming an organic light-emitting display layer on a flexible substrate; coating a nanocomposite material on the organic emitting display layer to form a nanocomposite layer; and forming a first inorganic layer on the nanocomposite layer. The nanocomposite material is obtained by modifying surfaces of a plurality of nanoparticles with oleyl phosphate and then dispersing the modified nanoparticles in an organic monomer.