An array substrate and a driving method thereof and a liquid crystal panel are provided. The array substrate includes plural scan lines, plural data lines and plural sub-pixels that are arranged in a matrix and are defined by the scan lines and the data lines, in which every two rows of sub-pixels constitutes a unit, sub-pixels in the same column and in the same unit are connected to the same data line, sub-pixels in the same column but respectively in two adjacent units are connected to different data lines, two adjacent columns of sub-pixels in the same unit are connected to different data lines, and two scan lines in the same unit are conducted at the same time.