An array substrate, a manufacturing method thereof, and a display device are provided. The array substrate includes a thin film transistor on a base substrate, and an electrode structure on the thin film transistor, and the electrode structure includes a pixel electrode and a common electrode insulated from each other. The array substrate further includes: a black matrix disposed on the thin film transistor, an orthographic projection of the thin film transistor on the base substrate is located within an orthographic projection of the black matrix on the base substrate, and the black matrix is electrically connected with the common electrode for providing common electrode signals to the common electrode.