Array substrate, repairing method of array substrate and display panel

The invention discloses an array substrate, a repairing method of the array substrate and a display panel. The array substrate comprises a substrate, a device layer and a test assembly, wherein the device layer is arranged on the substrate, the device layer comprises a first conductor layer, and the first conductor layer comprises a first wire and a second wire which are arranged at an interval; and the test assembly is arranged on the substrate, the test assembly comprises a first test pad, a second test pad and a to-be-cut structure, the first test pad is electrically connected with the first wire, the second test pad is electrically connected with the second wire, the to-be-cut structure electrically connects the first wire and the second wire, the first test pad, the first wire, the to-be-cut structure, the second wire and the second test pad form a first test branch, and first cutting depth information of the to-be-cut structure is obtained according to first resistance information of the first test bran