The invention provides an OLED display panel. A light-emitting functional layer of the OLED display panel comprises a pixel defining layer, a reflecting electrode, a cathode, a hole layer and a bufferlayer, wherein the reflecting electrode is arranged on a substrate, and the hole layer is arranged between the reflecting electrode and the cathode. The OLED display panel comprises a first area located between pixel definition layers, a buffer layer which is arranged between the reflecting electrode and the hole layer and used for adjusting the length of a micro-cavity between the reflecting electrode and the cathode, a second area and a third area, wherein the thickness of the hole layer in the first area, the thickness of the second area and the thickness of the third area are the same. During the ink-jet printing, due to the fact that the thicknesses of the hole layers are the same, the printing and drying can be carried out at the same time, and the technical problem that the hole layers of different thicknesses need to be printed and dried respectively in an existing OLED display panel is solved.