Embodiments of the present invention disclose an array substrate, a display device and a repair method of the array substrate. The array substrate comprises a display region; a peripheral region, in which a peripheral circuit including a plurality of leading wires is provided, and the peripheral region including: an insulation layer, provided above a layer in which the peripheral circuit is provided; and a leading wire repair layer, provided above the insulation layer, wherein the leading wire repair layer includes at least two common repair lines extended along an arrangement direction of the leading wires in the peripheral circuit, and a plurality of repair lines electrically connected the at least two common repair lines are provided between the two adjacent common repair lines.