A flexible organic light emitting diode (OLED) display panel and a manufacturing method thereof utilize a deep hole formed in a bending area and an organic film layer having an island structure pattern on the deep hole to allow metal wires to have a longer length for bending and to enlarge a bending surface area of the metal wires in the bending area, thereby reducing the stress applied on the metal wires in bending, mitigating a damage caused by the bending of the metal wires, and extending a lifespan of the display panel in bending.