Embodiments of the present invention provide a method for processing a terminal device and a terminal device. A preset instruction is executed by using a covered area of the terminal device. Specifically, a user input is acquired; the covered area of the terminal device is acquired according to the user input; and if the covered area is larger than a preset area, the preset instruction is executed. Using the foregoing method and the foregoing terminal device resolves technical problems of hardware wear and extra power consumption in the prior art, and brings the following beneficial effects without adding hardware: hardware wear of the terminal device caused by a user is reduced, power of the terminal device is saved, and operation efficiency of the user is improved.