A load-bearing accessory includes a hinge, a frame and a connector. The frame includes an adjustment portion and a support portion. The distance between the adjustment portion and the support portion is adjustable. A first end of the connector is connected to the hinge, and a second end of the connector is connected to the adjustment portion. One of the hinge or the frame that is located at the upper position of the load-bearing accessory is configured to support the connector, and the connector is configured to support the other one of the hinge or the frame that is located at the lower position of the load-bearing accessory.