An array substrate, a liquid crystal display panel and a liquid crystal display device. The array substrate includes: a plurality of pixel units defined by a plurality of intersecting data lines and scanning lines, wherein each of the plurality of pixel units comprises a thin film transistor and a pixel electrode electrically connected with the thin film transistor; a plurality of common electrode blocks disposed in a layer different from the pixel electrode, the common electrode blocks being reused as touch electrodes; a plurality of sensing lines, each of which is electrically connected with one of the common electrode blocks; and a plurality of auxiliary electrodes disposed in the same layer as the pixel electrode, wherein each of the plurality of auxiliary electrodes is disposed between two adjacent pixel electrodes, and overlapped and electrically connected with one of the sensing lines.