The present invention relates to an ultra slim bezel structure of liquid crystal display device, which includes a TFT surface having an inner face on which a PI film is arranged, a CF surface having an inner face on which a PI film is arranged, a sealant, and a first color resist barrier and a second color resist barrier. The inner faces of the TFT surface and the CF surface are in registration with each other in a vertical direction and edges of the inner faces of the TFT surface and the CF surface are bonded together with the sealant. The first color resist barrier includes a linear color resist barrier that is formed by continuously arranging color resist on the inner face of the TFT surface adjacent to the sealant to extend along the edge of the TFT surface. The second color resist barrier includes a linear color resist barrier that is formed by continuously arranging color resist on the inner face of the CF surface adjacent to the sealant to extend along the edge of the CF surface. The first color resist barrier and the second color resist barrier oppose each other at upper and lower sides and respectively block spread of the PI films on the TFT surface and the CF surface. The present invention effectively controls spread areas of PI films and realizes an ultra slim bezel design to thereby effectively handle peripheral mura.