A folding assembly, wherein the folding assembly comprises a first bracket, a second bracket, and a rotating mechanism; the rotating mechanism comprises a fastening structure, a first synchronous arm, a second synchronous arm, a connecting structure, a first shaft, a second shaft, a third shaft, and a fourth shaft; the first synchronous arm is connected to the first bracket, and is rotatably connected to the fastening structure by using the first shaft; the second synchronous arm is connected to the second bracket, and is rotatably connected to the fastening structure by using the second shaft; the connecting structure is rotatably connected to the first synchronous arm by using the third shaft and is rotatably connected to the second synchronous arm by using the fourth shaft, wherein the third shaft and the first shaft are spaced from each other, and the fourth shaft and the second shaft are spaced from each other; and the first synchronous arm can rotate relative to the fastening structure and drive, by using the connecting structure, the second synchronous arm to rotate relative to the fastening structure, so that the first bracket and the second bracket are folded or unfolded relative to each other, characterized in that the connecting structure is a connecting rod, wherein the first synchronous arm can rotate clockwise around the first shaft and drive the connecting rod to move towards the first synchronous arm, and the second synchronous arm is driven by the connecting rod to rotate counterclockwise around the second shaft, so that the first bracket and the second bracket are folded relative to each other; or the first synchronous arm can rotate counterclockwise around the first shaft and drive the connecting rod to move towards the second synchronous arm, and the second synchronous arm is driven by the connecting rod to rotate clockwise around the second shaft, so that the first bracket and the second bracket are unfolded relative to each other. the rotating mechanism comprises a fastening structure, a first synchronous arm, a second synchronous arm, a connecting structure, a first shaft, a second shaft, a third shaft, and a fourth shaft; the first synchronous arm is connected to the first bracket, and is rotatably connected to the fastening structure by using the first shaft; the second synchronous arm is connected to the second bracket, and is rotatably connected to the fastening structure by using the second shaft; the connecting structure is rotatably connected to the first synchronous arm by using the third shaft and is rotatably connected to the second synchronous arm by using the fourth shaft, wherein the third shaft and the first shaft are spaced from each other, and the fourth shaft and the second shaft are spaced from each other; and the first synchronous arm can rotate relative to the fastening structure and drive, by using the connecting structure, the second synchronous arm to rotate relative to the fastening structure, so that the first bracket and the second bracket are folded or unfolded relative to each other, characterized in that the connecting structure is a connecting rod, wherein the first synchronous arm can rotate clockwise around the first shaft and drive the connecting rod to move towards the first synchronous arm, and the second synchronous arm is driven by the connecting rod to rotate counterclockwise around the second shaft, so that the first bracket and the second bracket are folded relative to each other; or the first synchronous arm can rotate counterclockwise around the first shaft and drive the connecting rod to move towards the second synchronous arm, and the second synchronous arm is driven by the connecting rod to rotate clockwise around the second shaft, so that the first bracket and the second bracket are unfolded relative to each other.