A display panel, comprising: a substrate and a plurality of pixel units and a pixel defining layer (203, 204) which are on the substrate, wherein the pixel defining layer is used to define pixel regions, each of at least one of the pixel units comprises a first electrode, a second electrode and an organic functional layer, and the organic functional layer has an edge region; wherein the organic functional layer is located in the pixel region, the pixel defining layer comprises a first defining layer and a second defining layer, the first defining layer is on a side of the second defining layer away from the substrate; and an orthographic projection of the first defining layer on the substrate covers an orthographic projection of the second defining layer on the substrate, an opening area of the first defining layer is smaller than an opening area of the second defining layer so as to form a groove, at least a portion of the edge region of the organic function layer is located in the groove, so that an orthographic projection of at least the portion of the edge region of the organic function layer on the substrate falls into the orthographic projection of the first defining layer on the substrate, and a thickness of the edge region of the organic function layer is greater than a thickness of a remaining region of the organic function layer, wherein one of the first electrode and the second electrode is an anode, and the other of the first electrode and the second electrode is a cathode; characterised in that a material of the second defining layer is an electrically conductive material, the second defining layer has an electrically isolating region which is thoroughly formed in the thickness direction, and the electrically isolating region is used to isolate first electrodes in any two adjacent pixel units. a substrate and a plurality of pixel units and a pixel defining layer (203, 204) which are on the substrate, wherein the pixel defining layer is used to define pixel regions, each of at least one of the pixel units comprises a first electrode, a second electrode and an organic functional layer, and the organic functional layer has an edge region; wherein the organic functional layer is located in the pixel region, the pixel defining layer comprises a first defining layer and a second defining layer, the first defining layer is on a side of the second defining layer away from the substrate; and an orthographic projection of the first defining layer on the substrate covers an orthographic projection of the second defining layer on the substrate, an opening area of the first defining layer is smaller than an opening area of the second defining layer so as to form a groove, at least a portion of the edge region of the organic function layer is located in the groove, so that an orthographic projection of at least the portion of the edge region of the organic function layer on the substrate falls into the orthographic projection of the first defining layer on the substrate, and a thickness of the edge region of the organic function layer is greater than a thickness of a remaining region of the organic function layer, wherein one of the first electrode and the second electrode is an anode, and the other of the first electrode and the second electrode is a cathode; characterised in that a material of the second defining layer is an electrically conductive material, the second defining layer has an electrically isolating region which is thoroughly formed in the thickness direction, and the electrically isolating region is used to isolate first electrodes in any two adjacent pixel units.