An organic light-emitting diode (OLED) panel and a manufacturing method thereof are provided, wherein a color filter layer of the OLED panel includes a first color filter layer, a second color filter layer, a third color filter layer, and a reflective layer disposed between the first color filter layer, the second color filter layer, and the third color filter layer, wherein material of the reflective layer is same as material of the first color filter layer. Because the first color filter layer and the reflective layer are the same material, consumable cost of the mask is saved.