The invention discloses a liquid crystal display device and a driving method. The liquid crystal display device comprises a color filter substrate, an array substrate, and a liquid crystal layer located between the color filter substrate and the array substrate. The color filter substrate is provided with a viewing angle control electrode, and the array substrate includes A plurality of pixel units, each pixel unit is provided with a pixel electrode, the array substrate is provided with a first common electrode, the pixel electrode and the first common electrode are respectively located on the upper and lower sides of the insulating layer, and a plurality of insulating protrusions are formed on the insulating layer. Ridge, the second common electrode is also provided on the array substrate, the second common electrode and the pixel electrode are comb-shaped structures with slits in each pixel unit, and the electrode strips of the second common electrode and the electrode strips of the pixel electrode Alternately arranged, the electrode strips of the second common electrode are respectively arranged on a plurality of insulating ridges, and the electrode strips of the second common electrode protrude above the electrode strips of the pixel electrodes, so that the electrode strips of the second common electrode are compared with the electrode strips of the pixel electrodes The strip is closer to the color filter substrate.