The invention discloses a touch area setting method and device, relates to the technical field of touch control, and solves the problem of a relatively large error between a position which a user wants to click in a display window and an actual response position when the size of the display window is changed in the prior art. According to the specific scheme, the method comprises the steps of obtaining physical coordinates of a first reference point; correcting the physical coordinates of the first reference point according to a first parameter so as to obtain physical coordinates of a second reference point corresponding to the first reference point on a touch screen; and setting a touch area according to the physical coordinates of the second reference point. The method and the device are used for setting the touch area.