Disclosed is a flexible display device. The flexible display device includes: a housing, a closure lid, a flexible display panel, an extension mechanism and a controller. A shaft is provided inside the housing. A sidewall of the housing is provided with an opening. The closure lid is opposite to the opening, and a surface of the closure lid facing away from the opening is provided with a user identity recognition module. The flexible display panel is wound onto the shaft and includes a first end and a second end opposite to the first end. The first end is connected to the shaft, and the second end is connected to the closure lid. The extension mechanism is configured to support the flexible display panel extending out of the housing.