The invention provides a liquid crystal display device which comprises an upper substrate, an array substrate, and a liquid crystal layer arranged between the upper substrate and the array substrate, wherein a plurality of pixel electrode layers are arranged at one side of the array substrate, facing the liquid crystal layer; an orientating structure is arranged on the pixel electrode layer; the public electrode layer is arranged between the pixel electrode layer and the array substrate and forms a memory capacitor together with the pixel electrode layer; and the public electrode layer is arranged opposite to the orientating structure. The liquid crystal display device has higher aperture ratio and simultaneously solves the problem of black-state light leakage, thus improving display quality.