The invention discloses a flexible display device. The device comprises a rigid part and a flexible display part, a circuit board is arranged inside the rigid part, the flexible display part is used for displaying an image, and the circuit board is electrically connected with the flexible display part; the flexible display part comprises a first end and a second end opposite to the first end, thefirst end is rotationally connected with one end of the rigid part, the second end is provided with a first connecting piece, the end, away from the first end, of the rigid part is provided with a second connecting piece matched with the first connecting piece, and when the first connecting piece and the second connecting piece are connected, the rigid part and the flexible display part are connected end to end to form an annular structure. The flexible display device can be switched between the unfolded state and the winding state, the display mode of the flexible display device is flexible and variable, and the user experience is improved.