The present invention provides a curved liquid crystal display device, which includes a backlight module (1), a mold frame (3) mounted on the backlight module (1), a liquid crystal panel (5) arranged on the mold frame (3), and a bezel (7) that retains the liquid crystal panel (5) on the mold frame (3). The backlight module (1) includes a curved backplane (11) and optical components (13) arranged in the curved backplane (11). The curved backplane (11) includes a bottom board (111) and a bracing (9) mounted to the bottom board (111). The bracing (9) includes a base (91), a pair of guide rails (93) mounted to the base (91), a screw (95) rotatably mounted to the base (91), and a pair of slide blocks (97) that are in engagement with the screw (95) and slidable along the guide rails (93). The bottom board (111) includes a pair of protrusions (113) formed a surface thereof that is in contact engagement with the slide blocks (97) to correspond to the slide blocks (97). The pair of slide blocks (97) are arranged to respectively press against the pair of protrusions (113) so as to cause deformation of the bottom board (111) to form the curved backplane (11).