The invention provides a touch display device and drive method thereof. The device includes a first substrate, a sensing electrode layer positioned on the first substrate, a first passivation layer covering the sensing electrode layer, bridging patterns positioned on the first passivation layer, a pixel array positioned on the first passivation layer, a second substrate opposite to the first substrate, and a display media positioned between the first substrate and the second substrate; the sensing electrode layer includes first sensing electrode patterns and second sensing electrode patterns; each bridging pattern is electrically connected to two adjacent sensing electrode patterns and is across the corresponding first sensing electrode patterns; the pixel array includes scanning lines, data lines, active components which are electrically connected to the scanning lines and the data lines, and pixel electrodes; each active component includes a grid, a grid insulating layer, a drain and a source; each pixel electrode is electrically connected to the corresponding active component; the grid and the bridging patterns are formed by the same film layer. According to the invention, the manufacturing cost can be reduced, and the product performance is improved.