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 mounted 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 with first and second steps formed between edges of the CF substrate and the TFT substrate that correspond to opposite sides of the mold frame. The mold frame forms a retention section corresponding to the second step. The second step is received in and retained by the retention section. A surface decoration is bonded to the first step and fixed to the mold frame so as to fix the liquid crystal display panel to the mold frame.