The present invention relates to the field of display technology, and particularly relates to a bendable flexible display device. The display device comprises a display screen, a back plate arranged on the back of the display screen, and a support, the back plate being arranged on the support, wherein the back plate is a spliced back plate, and the display screen is a flexible display screen; and the back plate allows the display screen to be converted between a curved display state and a flat display state. The display device can be converted between a curved display state and a flat display state, to implement various viewing modes and meet different demands of all kinds of people.