The present invention provides a frameless liquid crystal display device, which includes a rear enclosure, a backlight module arranged inside the rear enclosure, a mold frame arranged on the backlight module and fixedly coupled to the rear enclosure, a liquid crystal display panel arranged on the mold frame, and a surface decoration arranged at a lower end of the liquid crystal display panel. The liquid crystal display panel includes a CF substrate and a TFT substrate laminated on the CF substrate and a top polarization plate and a bottom polarization plate respectively laminated to the CF substrate and the TFT substrate. The bottom polarization plate forms projections on upper and lower ends of the liquid crystal display panel. The mold frame forms retention slots in which the projections are received to mount the liquid crystal display panel to the mold frame.