A rotating module, comprising: two rotating arms; and a bracket, having a track groove and located between the two rotating arms, wherein the two rotating arms are capable of rotating around the bracket with rotation axles of the two rotating arms; characterized in that: each rotating arm comprises: a first rotating piece, wherein a first end of the first rotating piece is located in the track groove; and a second rotating piece, rotatably connected with the bracket and a second end of the first rotating piece respectively, wherein the second end is an opposite end of the first end; when the rotating module is in a folded state, a rotation axle of the first rotating piece is in a first position on a groove wall of the track groove, and the first position is closer to an edge position of the track groove; when the rotating module is in an unfolded state, the rotation axle of the first rotating piece is in a second position on the groove wall of the track groove, and the second position is located between a center position of the track groove and the first position; and the rotation axles of each rotating arm at least include a rotation axle between the second rotating piece and the bracket, a rotation axle between the first rotating piece and the second rotating piece, and a rotation axle between the first rotating piece and the bracket, and the rotation axle of the first rotating piece is one rotation axle of the rotating arm; the second rotating piece further has: a groove, and a groove wall of the groove is in a circular arc shape; and the second end of the first rotating piece is located in the groove and configured to be driven to move along the groove wall of the groove while folding or unfolding. two rotating arms; and a bracket, having a track groove and located between the two rotating arms, wherein the two rotating arms are capable of rotating around the bracket with rotation axles of the two rotating arms; characterized in that: each rotating arm comprises: a first rotating piece, wherein a first end of the first rotating piece is located in the track groove; and a second rotating piece, rotatably connected with the bracket and a second end of the first rotating piece respectively, wherein the second end is an opposite end of the first end; when the rotating module is in a folded state, a rotation axle of the first rotating piece is in a first position on a groove wall of the track groove, and the first position is closer to an edge position of the track groove; when the rotating module is in an unfolded state, the rotation axle of the first rotating piece is in a second position on the groove wall of the track groove, and the second position is located between a center position of the track groove and the first position; and the rotation axles of each rotating arm at least include a rotation axle between the second rotating piece and the bracket, a rotation axle between the first rotating piece and the second rotating piece, and a rotation axle between the first rotating piece and the bracket, and the rotation axle of the first rotating piece is one rotation axle of the rotating arm; the second rotating piece further has: a groove, and a groove wall of the groove is in a circular arc shape; and the second end of the first rotating piece is located in the groove and configured to be driven to move along the groove wall of the groove while folding or unfolding. a first rotating piece, wherein a first end of the first rotating piece is located in the track groove; and a second rotating piece, rotatably connected with the bracket and a second end of the first rotating piece respectively, wherein the second end is an opposite end of the first end; when the rotating module is in a folded state, a rotation axle of the first rotating piece is in a first position on a groove wall of the track groove, and the first position is closer to an edge position of the track groove; when the rotating module is in an unfolded state, the rotation axle of the first rotating piece is in a second position on the groove wall of the track groove, and the second position is located between a center position of the track groove and the first position; and the rotation axles of each rotating arm at least include a rotation axle between the second rotating piece and the bracket, a rotation axle between the first rotating piece and the second rotating piece, and a rotation axle between the first rotating piece and the bracket, and the rotation axle of the first rotating piece is one rotation axle of the rotating arm; the second rotating piece further has: a groove, and a groove wall of the groove is in a circular arc shape; and the second end of the first rotating piece is located in the groove and configured to be driven to move along the groove wall of the groove while folding or unfolding.