An array substrate, a display panel and a repairing method thereof are provided. In the array substrate, except the last gate line, both ends of each of the remaining gate lines are provided respectively with first leads connected to the gate line; in each group of gate integrated drive circuits, except a first level shift register, an input terminal of every other shift register is provided with a second lead connected to the input terminal; the first lead connected to one of the gate lines and the second lead connected to an input terminal of the shift register at the next level adjacent thereto have an overlapping area (A) therebetween, and are insulated from each other.