An array substrate and display device are provided. The array substrate includes a base substrate, and gate lines, data lines, compensation blocks and sub-pixels located on the base substrate. Two gate lines are arranged between two adjacent rows of sub-pixels. The data lines are provided with multiple first extensions and second extensions arranged alternately. The extending direction of the first extensions intersects with the extending direction of the second extensions. The gate lines and data lines define multiple first pixel areas and second pixel areas on the base substrate. Two sub-pixels are arranged in the first pixel area, and one sub-pixel is arranged in the second pixel area. The multiple first pixel areas are arranged in an array, the multiple second pixel areas are arranged in two columns, and multiple columns of the first pixel areas are located between the two columns of the second pixel areas.