Provided is a support device. The support device is disposed on a back side of a bendable structure, the bendable structure including a bending portion, and a first non-bending portion and a second non-bending portion disposed on two sides of the bending portion, respectively; the support device including: a first support, configured to be connected to the first non-bending portion; a second support, configured to be connected to the second non-bending portion; a rotating shaft support, configured to be rotatably connected to the first support and the second support; and at least one support component, wherein each support component is connected to the rotating shaft support and configured to be connected to the bending portion.