Abstract: The present application provides an array substrate and a preparation method thereof, and a display device. The array substrate includes: a base substrate; a first conductive layer, disposed on the base substrate, including conductive pad groups, each of the conductive pad group includes at least one conductive pad; a second conductive layer, disposed on the first conductive layer facing away from the base substrate, an orthographic projection of at least a partial area of each of the conductive pads in the conductive pad groups on the base substrate does not overlap with an orthographic projection of the second conductive layer on the base substrate; a thickness of the first conductive layer in a direction perpendicular to a plane where the base substrate is located is greater than or equal to a thickness of the second conductive layer in the direction perpendicular to the plane where the base substrate is located.