A curvature adjustable display device includes a base, a display panel arranged on the base, a rear cover arranged rearwards of the display panel and having a bottom extending into an interior of the base, connection sections arranged in the interior of the base and respectively connected to two opposite side edges of the rear cover, an adjustment mechanism arranged in a front portion of the base, and two chains arranged in the interior of the base and each having two ends respectively connected to the connection sections and the adjustment mechanism. Rotation of the adjustment mechanism stretches the chains and drives, via the connection sections, the rear cover to curve, and simultaneously, the rear cover drives the display panel to curve so as to achieve adjustment of curvature of the display panel.