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, and a liquid crystal display panel arranged on the mold frame. 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 top polarization plate is a flexible polarization film having an upper end coupled to the mold frame so as to fix an upper end of the liquid crystal display panel to the mold frame. The liquid crystal display panel forms a step on which a surface decoration is positioned to fix to the mold frame.