The present disclosure discloses a double-grid panel in-cell touch device, comprising a touch panel which includes a plurality of base units with two grid scanning lines being arranged between every two adjacent rows of base units. Each base unit includes three pixel electrodes respectively selected as red, green, and blue, with a data line arranged between every two adjacent columns of pixel electrodes, so that four data lines are provided at each column of base units with two of the four data lines respectively placed at both sides of the column thereof, wherein each pixel electrode has a pixel switch connected to one of the four data lines, and the pixel switches at each column of pixel units are distributed in such a manner that at least one of said four data lines is vacant. Each base unit is connected to a touch unit which is further connected to one of the grid scanning lines, and the grid scanning line connected to the touch unit serves as a touch scanning line, while one of the vacant data lines serves as a touch receiving line which is connected to the touch unit. The touch device achieves the touch function without addition of extra wires or processing difficulties based on the structure of the existing double-grid panels.