Provided are an array substrate and a manufacturing method thereof. A first wire of a fanout line of the array substrate is divided into a plurality of first sections. A second wire of the fanout line is divided into a plurality of second sections corresponding to the first sections. Each of the first sections is electrically connected to the second section corresponding thereof. Thus, as a certain position of the first wire or the second wire is broken, only a resistance of the first section or the second section where the broken position is located is changed, so that a blocking effect on the entire fanout lines is not large, thereby reducing or avoiding appearance of a light line.