A glasses-free 3D liquid crystal display device, comprising: an array substrate; a color filter substrate; a cylindrical lens array arranged on one side of the color filter substrate; a plurality of data lines disposed in a first direction and a plurality of gate lines disposed in a second direction perpendicular to the first direction, and the data lines and the gate lines are disposed on the array substrate, wherein the data line comprises a periodically varying flexuous line extending in the first direction, in addition or alternatively, the gate line comprises a periodically varying flexuous line extending in the second direction; and a plurality of pixel units defined by crossing of the data lines and the gate lines, and each of the pixel units comprises a first sub-pixel and a second sub-pixel, the first sub-pixel and the second sub-pixels are adjacent to each other in the first direction, wherein the width of each lens in the cylindrical lens array is equal to the width of the cross-section of the pixel unit in the first direction, and in each of the pixel units, the arrangement direction of the first sub-pixel and the second sub-pixel is the same as that of the lenses of the cylindrical lens array; wherein, in the pixel units, the first sub-pixel and the second sub-pixel respectively have a thin film transistor, TFT, and wherein, both the gate electrode of the TFT of the first sub-pixel of a pixel unit and the gate electrode of the TFT of the first sub-pixel of an adjacent pixel unit adjacent to said pixel unit in the second direction are connected to the same gate line, and characterized in that both the gate electrode of the TFT of the second sub-pixel of said pixel unit and the gate electrode of the TFT of the second sub-pixel of said adjacent pixel unit are connected to the same gate line, and two TFTs connected to the same gate line are electrically connected with different data lines; and no gate line is formed between the first sub-pixel and the second sub-pixel of a pixel unit. an array substrate; a color filter substrate; a cylindrical lens array arranged on one side of the color filter substrate; a plurality of data lines disposed in a first direction and a plurality of gate lines disposed in a second direction perpendicular to the first direction, and the data lines and the gate lines are disposed on the array substrate, wherein the data line comprises a periodically varying flexuous line extending in the first direction, in addition or alternatively, the gate line comprises a periodically varying flexuous line extending in the second direction; and a plurality of pixel units defined by crossing of the data lines and the gate lines, and each of the pixel units comprises a first sub-pixel and a second sub-pixel, the first sub-pixel and the second sub-pixels are adjacent to each other in the first direction, wherein the width of each lens in the cylindrical lens array is equal to the width of the cross-section of the pixel unit in the first direction, and in each of the pixel units, the arrangement direction of the first sub-pixel and the second sub-pixel is the same as that of the lenses of the cylindrical lens array; wherein, in the pixel units, the first sub-pixel and the second sub-pixel respectively have a thin film transistor, TFT, and wherein, both the gate electrode of the TFT of the first sub-pixel of a pixel unit and the gate electrode of the TFT of the first sub-pixel of an adjacent pixel unit adjacent to said pixel unit in the second direction are connected to the same gate line, and characterized in that both the gate electrode of the TFT of the second sub-pixel of said pixel unit and the gate electrode of the TFT of the second sub-pixel of said adjacent pixel unit are connected to the same gate line, and two TFTs connected to the same gate line are electrically connected with different data lines; and no gate line is formed between the first sub-pixel and the second sub-pixel of a pixel unit.