a perpendicular direction during the touch calculate distances between the starting point and ending point in the horizontal direction and the perpendicular direction and determine the greater distance as the touch input length the touch input slope an angle between the starting point and ending point in the horizontal direction and the perpendicular direction is determined as touch input slope the touch input speed a number of points input within a unit time in the touch input process is calculated as the touch input speed and the touch input time a time recorded by the touch screen for finishing complete touch input step 101 it is determined whether the blank screen gesture is an accidentally operated gesture according to the acquired related information of the blank screen gesture a related operation of the blank screen gesture is triggered when it is not the accidentally operated gesture and no response is made to the accidentally operated gesture when the blank screen gesture is the accidentally operated gesture in this step the step of determining whether the blank screen gesture is the accidentally operated gesture includes that it is determined whether the touch input area meets a preset requirement if yes whether the touch input.