An organic light emitting diode display panel having a plurality of pixels, each of which includes a subpixel region and an inter-subpixel region, the organic light emitting diode display panel comprising: a base substrate; a first electrode layer on the base substrate; a light emitting layer in the subpixel region on a side of the first electrode layer distal to the base substrate; a second electrode layer on a side of the light emitting layer distal to the first electrode layer; and an auxiliary electrode layer in the inter-subpixel region in a same layer as the second electrode layer, wherein the auxiliary electrode layer and the second electrode layer are in contact with each other; wherein the second electrode layer comprises a first portion in the subpixel region and a second portion in the inter-subpixel region, the first portion is electrically connected to the auxiliary electrode layer through the second portion, and the auxiliary electrode layer has a thickness larger than that of the first portion of the second electrode layer; the first portion of the second electrode layer has a thickness in a range of 5 nm to 20 nm; the auxiliary electrode layer has a thickness in a range of 50 nm to 500 nm; the second electrode layer is a transparent electrode layer made of a transparent metal material; characterized in that the auxiliary electrode layer is a non-transparent electrode layer made of a non-transparent metal material; a ratio between the thickness of the auxiliary electrode layer to the thickness of the first portion of the second electrode layer is in a range of 10 to 100; and the auxiliary electrode layer has a cross-section having an inverted trapezoidal shape and a short base of the inverted trapezoidal shape is on a side of the auxiliary electrode layer proximal to the first electrode layer and the second portion of the second electrode layer has a triangular shape cross-section. a base substrate; a first electrode layer on the base substrate; a light emitting layer in the subpixel region on a side of the first electrode layer distal to the base substrate; a second electrode layer on a side of the light emitting layer distal to the first electrode layer; and an auxiliary electrode layer in the inter-subpixel region in a same layer as the second electrode layer, wherein the auxiliary electrode layer and the second electrode layer are in contact with each other; wherein the second electrode layer comprises a first portion in the subpixel region and a second portion in the inter-subpixel region, the first portion is electrically connected to the auxiliary electrode layer through the second portion, and the auxiliary electrode layer has a thickness larger than that of the first portion of the second electrode layer; the first portion of the second electrode layer has a thickness in a range of 5 nm to 20 nm; the auxiliary electrode layer has a thickness in a range of 50 nm to 500 nm; the second electrode layer is a transparent electrode layer made of a transparent metal material; characterized in that the auxiliary electrode layer is a non-transparent electrode layer made of a non-transparent metal material; a ratio between the thickness of the auxiliary electrode layer to the thickness of the first portion of the second electrode layer is in a range of 10 to 100; and the auxiliary electrode layer has a cross-section having an inverted trapezoidal shape and a short base of the inverted trapezoidal shape is on a side of the auxiliary electrode layer proximal to the first electrode layer and the second portion of the second electrode layer has a triangular shape cross-section.