This disclosure discloses a touch display panel, a driving method thereof and a touch display device. The touch display panel comprises a first substrate and a second substrate aligned with each other; a first signal transmission line and a second signal transmission line arranged on the first substrate, the second signal transmission line intersecting with the first signal transmission line; gate lines and data lines arranged on the second substrate, the second substrate being further provided with a first signal output end and a second signal output end led out from the gate lines and arranged alternately; and a first spacer corresponding to the first signal transmission line and a second spacer corresponding to the second signal transmission line.