The present application discloses a slidable flexible display device, including a first supporting body, a second supporting body, and a linkage mechanism. The first supporting body includes a first rear shell and a rear shell disposed on the first rear shell. The first supporting body and the second supporting body are slidable along a straight line between the first supporting body and the second supporting body. The linkage mechanism includes screw rod assemblies and a screen fixing plate. The first supporting plate and the screen fixing plate are respectively linked to the screw rod assemblies.