The present invention belongs to the field of display technology and particularly relates to an electrode lead-out structure, an array substrate and a display device. The electrode lead-out structure comprises a substrate electrode, an isolating layer and an lead-out electrode. The isolating layer covers the substrate electrode to expose a part of region of the substrate electrode through a via formed in the isolating layer, and the lead-out electrode is in contact with the exposed region of the substrate electrode, wherein the lead-out electrode covers the wall and bottom of the via of the isolating layer and extends from an upper edge of the via of the isolating layer along an upper surface of the isolating layer to overlap with the upper layer of the isolating layer.