The present application provides a foldable array substrate, a manufacturing method thereof and a display device. The foldable array substrate includes a base substrate, a gate metal layer disposed on one side of the base substrate, a source-drain metal layer disposed on the side of the gate metal layer opposite to the base substrate, and an insulating layer disposed between the gate metal layer and the source-drain metal layer. The gate metal layer comprises a gate line, the source-drain metal layer comprises a data line, and the gate line is arranged in an intersecting manner with the data line to define a plurality of pixel units on the base substrate. A plurality of holes are disposed on the foldable array substrate, and the holes are not disposed in a pixel unit, and extend from the side of the insulating layer opposite to the base substrate toward the base substrate. By adopting the foldable array substrate, the display device and the manufacturing method of the foldable array substrate of the present invention, the bending performance of the foldable array substrate may be improved by reducing the stress of the foldable array substrate.