The invention provides a semitransparent and semi-reflective liquid crystal display device, which comprises a first substrate, a second substrate and a liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate; the liquid crystal layer is formed between the first substrate and the second substrate; a transmission region and a reflecting region are formed between the first substrate and the second substrate; liquid crystal box thicknesses of the transmission region and the reflecting region are equal to each other; a part on the first substrate which corresponds to the reflecting region is provided with a first pixel electrode; the second substrate is provided with a public electrode corresponding to the transmission region and the reflecting region; the second substrate is further provided with a first insulating layer positioned on the public electrode; and a part on the second substrate which corresponds to the transmission region is further provided with a plurality of second pixel electrodes which are positioned on the first insulating layer and are arranged at certain intervals. Due to the adoption of the scheme of the invention, a semitransparent and semi-reflective display effect can be realized; and due to the adoption of an electrode structure in the reflecting region, the display visual angle is expanded, and the contrast is increased; and a single box thickness structure is adopted, so that the difficulty of a process can be lowered.