A device for dismantling a liquid crystal display includes a carrier platform, a dismantling bracket, a dividing piece and a driving component; the carrier platform includes a carrying surface for supporting the liquid crystal display to be dismantled thereon, and the liquid crystal display to be dismantled includes a display panel and a backlight unit bonded to each other; the dividing piece is located above the carrier platform and mounted onto the dismantling bracket; the dividing piece is capable of being driven by the driving component so as to move in a first direction and into a slit between the display panel and the backlight unit; and the first direction intersects with an extending direction of the dividing piece. The dismantling device for liquid crystal display can solve the problem that the display panel and the backlight unit are difficult to be dismantled.