An active matrix organic light-emitting diode array substrate, a manufacturing method thereof and a display device including the same are disclosed to improve the aperture ratio of pixel of the array substrate and the display quality of the display device. The array substrate includes: a substrate; and a plurality of pixel units located on the substrate and arranged in array manner, each of the pixel units comprising a thin film transistor, a first transparent electrode, a second transparent electrode and a gate insulation layer provided between the first transparent electrode and the second transparent electrode. The first transparent electrode is provided on the substrate and is electrically connected to a gate of the thin film transistor; and the second transparent electrode is electrically connected to a drain of the thin film transistor, and the second transparent electrode is positioned opposite to the first transparent electrode to form a storage capacitor of the pixel unit therebetween.