The present invention relates to a TFT substrate and a manufacture method thereof. The TFT substrate includes a substrate, a plurality of signal lines, a common electrode, and a pixel electrode. The signal lines are arranged on the substrate along two perpendicular directions. One of two signal lines perpendicular to each other includes a plurality of segments. Every two segments closed to each other are arranged on two opposite sides of the other signal line of the two signal lines. The TFT substrate further includes a connecting signal line. The connecting signal line is connected to the two segments of the signal line composing a plurality of segments. The common electrode is arranged in a same layer as the connecting signal line and overlaps the signal line transferring image signals along a direction perpendicular to the substrate.