An array substrate, a driving method thereof and a display device are disclosed. In the array substrate, one second scanning signal line (104) is disposed at a position corresponding to the (2N+1)th row of sub-pixels or the (2N+2)th row of sub-pixels, or one second scanning signal line (104) is disposed at a position corresponding to the (N+1)th row of sub-pixels; each first switching element (107) is disposed in a corresponding sub-pixel; each second switching element (108) is disposed in a corresponding sub-pixel group; each first scanning signal line (103) is configured to control a plurality of first switching elements (107) in one row of sub-pixels (105); and each second scanning signal line (104) is configured to control a plurality of second switching elements (108) in one row of sub-pixel groups (109). The display device can have resolution reduced by half or three fourth in the case of full screen display, and lowers drive power consumption of the display panel without affecting display brightness.