Touch signal scanning method

The invention provides a touch signal scanning method. The touch signal scanning method comprises the steps of sending first touch driving signals to all touch drive lines; detecting the first touch induction signals of all touch induction lines; determining at least one to-be-scanned touch induction line according to the first touch induction signals of all the touch induction lines and preset rules; sending second touch driving signals to to-be-scanned touch induction lines; receiving second touch induction signals through the touch drive lines; and determining the positions of touch operations according to the second touch induction signals. According to the touch signal scanning method, through two-time secondary operations, the touch scanning time is shortened, and the touch effect of a touch control display device is not affected.