PIXEL DEFINING LAYER AND MANUFACTURING METHOD THEREOF, AND DISPLAY PANEL

Disclosed are a pixel defining layer and a manufacturing method thereof, and a display panel, in the field of display technologies. An auxiliary electrode pattern is on a side of a substrate and configured to be electrically connected to a cathode in a display panel; and a first sub-defining layer is on a side of the auxiliary electrode pattern away from the substrate. A pixel defining layer has a plurality of openings, and the plurality of openings all pass through the auxiliary electrode pattern and the first sub-defining layer. The opening is configured to accommodate a material of a light emitting layer. An orthographic projection of the auxiliary electrode pattern on the substrate is within an orthographic projection of the first sub-defining layer on the substrate.