The invention discloses a touch display screen. The touch display screen comprises a display panel and a backlight module which are stacked. The display panel comprises a first substrate, a second substrate, a liquid crystal layer, a first polaroid, a second polaroid, a shielding layer, a control circuit and a conducting part. The second substrate is opposite to the first substrate. The liquid crystal layer is arranged between the first substrate and the second substrate. The first polaroid is arranged on the side, away from the second substrate, of the first substrate, and the second polaroid is arranged on the side, away from the first substrate, of the second substrate. The shielding layer is arranged between the second substrate and the second polaroid. The control circuit is arranged on the surface of the first substrate. The conducting part is arranged on the surface of the first substrate. One end of the conducting part is electrically connected with the shielding layer, and the other end of the conducting part is electrically connected with the control circuit. A touch display method for driving the touch display screen is provided. The control circuit controls the conducting part to be connected into fixed potential at the scanning stage; the control circuit controls the conducting part to receive input signals at the touch display stage.