An array substrate, a repairing method thereof and a display device, wherein the array substrate includes: a plurality of gate lines and a plurality of data lines provided in a display region, gate lead lines provided in a non-display region and respectively connected to the gate lines and a gate driver IC, and data lead lines provided in the non-display region and respectively connected to the data lines and a data driver IC. The array substrate further includes: at least one first repairing line provided in a same layer as the gate lead lines, and at a position corresponding to a data lead line; and/or, at least one second repairing line provided in a same layer as the data lead lines, and at a position corresponding to a gate lead line.