A liquid crystal display screen includes a first electrode plate, a second electrode plate opposite to the first electrode plate and a liquid crystal layer sandwiched between the first electrode plate and the second electrode plate. A first alignment layer is located on the first electrode plate and faces the liquid crystal layer. The first alignment layer comprises a plurality of parallel first grooves defined therein. A second alignment layer is located on the second electrode plate and faces the liquid crystal layer. The second alignment layer comprises a plurality of parallel second grooves defined therein. The second grooves are perpendicular to the first grooves. At least one of the first alignment layer and second alignment layer comprises a carbon nanotube layer and a fixing layer located thereon facing the liquid crystal layer. The carbon nanotube layer comprises a plurality of carbon nanotube wires being arranged in parallel and closely located.