A touch display panel includes a first substrate, a second substrate, a display medium layer, a transparent electrode layer, a first conductive layer, a control unit and a ground electrode layer. The display medium layer is disposed between the first and second substrates. The transparent electrode layer is disposed on an inner surface of the first substrate and includes touch electrodes disposed in the display region. The first conductive layer is disposed at the transparent electrode layer and includes touch conductive lines and force sensing lines. Each touch conductive line is electrically connected to one touch electrode. The force sensing lines are electrically insulated from the touch conductive lines. A portion of the force sensing lines is connected to the control unit. The ground electrode layer is disposed on the second substrate. A force sensor is formed of the ground electrode layer, the force sensing lines and the control unit.