OLED display panel

The invention provides an OLED display panel. The OLED display panel comprises a substrate, a first gate insulation layer, a first gate metal layer, a second gate insulation layer, a second gate metallayer, a dielectric insulation layer, a source drain metal layer and a flat layer which are arranged in sequence, wherein the first gate metal layer comprises a first low-level signal wire, the second gate metal layer comprises a data signal wire, the dielectric insulating layer is provided with a first through hole, the first through hole exposes the first low-level signal wire, the source drainmetal layer comprises a power signal wire, a second low-level signal wire and a first protection wire, the second low-level signal wire is electrically connected with the first low-level signal wirethrough the first through hole, the potential of the second low-level signal wire is lower than that of the power supply signal wire, and the potential of the first protection wire is lower than thatof the second low-level sign