Liquid crystal display device with touch sensing function and touch sensing method thereof

The invention discloses a liquid crystal display device with touch sensing function, comprising a pixel gate line which is used for transmitting a pixel gate line signal, a pixel data line which is used for transmitting a pixel data signal, a pixel unit which is electrically connected with the pixel gate line and the pixel data line and is used for outputting an image signal according to the pixel gate line signal and the pixel data signal, a first sensing gate line which is used for transmitting a first sensing gate signal, a second sensing gate line which is used for transmitting a second sensing gate signal, a bias voltage line which is used for transmitting a bias voltage signal, a sensing unit which is electrically connected with the first sensing gate line, the second sensing gate line and the bias voltage line provides a first analogy sense signal according to the first sensing gate signal, the second sensing gate signal and the bias voltage signal, and a first sense line whichis electrically connected with a sensing unit and is used for transmitting the first analogy sense signal.