The present invention provides a liquid crystal display device and display control method thereof. Each sub-pixel of the liquid crystal display device includes multiple display regions and multiple control switches for controlling the display regions to receive corresponding data voltages, wherein, the multiple control switches includes a first control switch set and a second control switch set, and the first control switch set and the second control switch set are connected in parallel with the same data line. Through the above way, the present invention can increase the pixel aperture ratio of the wide-viewing-angle liquid crystal display device and decrease the power consumption.