Disclosed is a liquid crystal display device, which includes a base, a supporting part, and a liquid crystal display. The supporting part is fixedly connected with the liquid crystal display. A sliding hole along a horizontal direction is defined at the supporting part. The device further includes a first and second posts for supporting the liquid crystal display. The first post includes a first sliding end and a first connecting end, and the second post includes a second sliding end and a second connecting end. The first and second sliding ends slide to connect with the sliding hole. The first and second posts are screw-connected by the first connecting end and the second connecting end and screw-connected with the base. The first and second posts control a distance between the liquid crystal display and the base by rotating inwardly or outwardly.