An array substrate, a method for repairing disconnection of the data line and a display device are disclosed. The array substrate is divided into a plurality of pixel regions by data lines and gate lines, each pixel region is provided with a thin-film transistor and a pixel electrode, a gate of the thin-film transistor is connected to the gate line, a source is connected to the data line, a drain is connected to the pixel electrode. The array substrate further comprises a common electrode line, which includes a common electrode line mainbody disposed in parallel to the gate line, common electrode line branches extending along a direction of the data line and disposed at both sides of the data line, and common electrode line bridges between the common electrode line branches, the common electrode line bridges and the data line intersect each other and are insulated from each other.