Array substrates, motherboards of array substrates, display panels and method for forming display panels are provided. The array substrate includes sub-pixels, data lines, multiple-channel distribution units, X first switch control lines, test units and N second switch control lines. The first output terminals of the X first switch elements of a same multiple distribution unit are connected to the X data lines of the same data line group. The first control terminals of the X first switch elements of each multiple-channel distribution unit are connected to the X first switch control lines. The second output terminals of the second switch elements in a same test unit are electrically connected to the first input end of the first switch elements in the same multiple-channel distribution unit. The second control terminals of the N second switch elements in each test unit are connected to the N second switch control lines.