a flexible display panel having an unrolled state and a rolled state, the flexible display panel comprising a first end and a second end opposite to the first end;

an auxiliary structure having an unfolded state and a folded state, the auxiliary structure comprising a third end and a fourth end opposite to the third end, and the fourth end being connected with the second end;

a first reel, connected with the first end; and

a driving unit, wherein

when driving the flexible display panel to switch from the unrolled state to the rolled state and driving the auxiliary structure to switch from the unfolded state to the folded state, the driving unit drives the fourth end to move close to the first reel, and drives the first reel to rotate to drive the second end to move close to the first reel and to wind the flexible display panel around the first reel; and

when driving the flexible display panel to switch from the rolled state to the unrolled state and driving the auxiliary structure to switch from the folded state to the unfolded state, the driving unit drives the first reel to rotate to unwind the flexible display panel wound around the first reel from the first reel, and drives the fourth end to move away from the first end to drive the second end to move away from the first reel,

wherein the auxiliary structure comprises a rod portion, the flexible display device further comprises a fixed shaft, and the rod portion is rotatable around the shaft; and when driving the auxiliary structure to switch to the unfolded state, the driving unit drives the rod portion to rotate around the shaft to move a fourth end of the rod portion away from the first reel; and when driving the auxiliary structure to switch to the folded state, the driving unit drives the rod portion to rotate around the shaft to move the fourth end of the rod portion close to the first reel, and

wherein the rod portion is provided with a strip-shaped slot, the shaft passes through the strip-shaped slot, and the strip-shaped slot is movable and rotatable relative to the shaft; when driving the auxiliary structure to switch to the folded state, the driving unit drives the strip-shaped slot to rotate and move relative to the shaft to increase a distance between a third end of the rod portion and the shaft, so as to drive the fourth end of the rod portion to move close to the first reel; and when driving the auxiliary structure to switch to the unfolded state, the driving unit drives the strip-shaped slot to rotate and move relative to the shaft to decrease the distance between the third end of the rod portion and the shaft, so as to drive the fourth end of the rod portion to move away from the first reel.