An array substrate is disclosed, and has a substrate. A first metal layer, a first insulation layer, a second metal layer, a second insulation layer, and a pixel electrode layer are disposed on the substrate successively. A plurality of first through holes and a plurality of second through holes are disposed on the position of a link line, so as to expose the first metal line and the second metal line. The first metal line is electrically connected to the second metal line through a conductive line of the pixel electrode layer. Thus, the problem of vertical and parallel light lines of a drain discharge module can be efficiently improved.