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. <EOS>