A touch display panel, a driving method thereof and a display device. The touch display panel includes a plurality of driving electrodes and a plurality of sensing electrodes, a scanning signal transmitting unit, a first touch detection unit and a second touch detection unit; the scanning signal transmitting unit is configured to send scanning signals to the driving electrodes during the touch stage; the first touch detection unit is configured to collect signals through the sensing electrodes and determine an X coordinate and a Y coordinate of the touch position during a first preset period of time; the second touch detection unit is configured to collect signals through the driving electrodes and determine a Z coordinate of the touch position during a second preset period of time; and the first preset period of time and the second preset period of time are periods of time of the touch stage.