A three-dimensional (3D) liquid crystal display (LCD) device is provided, comprises: an LCD panel (10), configured to display an image and comprising a plurality of first pixel units; a liquid crystal light-splitting device (100), disposed on a light exiting side of the LCD panel (10) and comprising a plurality of second pixel units; and a first polarizer (200), disposed on a light exiting side of the liquid crystal light-splitting device (100), wherein the second pixel units are in one-to-one correspondence with the first pixel units; in a condition that the 3D LCD device is in a 3D operating mode, the liquid crystal light-splitting device (100) has a light-splitting function; and in a condition that the 3D LCD device is in a 2D operating mode, an operating state of each of the plurality of second pixel units of the liquid crystal light-splitting device (100) is consistent with that of a corresponding first pixel unit.