An OLED display device includes a display panel, a metal sheet, and a middle frame. The display panel is closely attached to one side of the metal sheet, and is defined with a foldable area and a non-foldable area. The metal sheet is disposed between the middle frame and the display panel. The middle frame is disposed on one side of the metal sheet facing away from the display panel. The foldable area of the middle frame is disposed with a hub piece, and the foldable area of the metal sheet is disposed with a magnet sheet, and the magnet sheet is disposed opposite to the hub piece.