A flexible display panel, an electronic device, and a hinge are provided. Each adjacent two of support members in the hinge are rotated by a rotation mechanism, and each alternate two of the support members are interlinked by a linkage mechanism. In response to a plurality of support members moving to a first position, the plurality of support members are disposed horizontally, so as to provide a flat support surface for a main body of the flexible display panel, thereby alleviating a problem that a surface of a flexible display panel mechanism before folding does not match a size of a flexible screen in an existing external foldable display device.