Linear processing method and system of coordinates of touched point at marginal area of touch screen

The invention is suitable for the technical field of touch sensing and provides linear processing method and system of coordinates of a touched point at the marginal area of a touch screen, wherein the method comprises the following steps of: a. calculating initial coordinates of the touched point according to capacitance matrix data around the touched point; b. inputting the initial coordinates into a linear processing model which is established in advance and obtaining actual coordinates of the touched point, wherein the linear processing model contains functional relation information of the actual coordinates and the initial coordinates of the touched point; and c. responding the touching operation of a user at the position of the actual coordinates. When the marginal area of the touch screen is touched, the initial coordinates of the touched point, which are obtained by calculation according to the capacitance matrix data around the touched point, are input into the linear processing model to be carried out linear processing, and the actual coordinates of the touched point are obtained according to the functional relation information of the actual coordinates and the initial coordinates of the touched point in the model, therefore, the distortion is avoided when the coordinates of the touched point at the marginal area of the touch screen are calculated.