An organic light-emitting diode (OLED) display panel is provided. The OLED display panel comprises a substrate, inorganic layers, organic layers, a light emitting layer, an encapsulation layer, and a via hole. The via hole is extended through the inorganic layers and the organic layers. The via hole is in a blocking wall area. A side wall of the via hole includes at least one recess. The light emitting layer is discontinuous at the at least one recess. By forming the deep via hole between a through hole area and a display area and also by forming the recess in the side wall of the via hole, continuity of the organic light emitting layer to the through hole area is interrupted, so that the display area is prevented from being entered by water and oxygen.