A method for adjusting a sound volume of a terminal, a terminal and a non-transitory tangible computer-readable storage medium are disclosed. The method may include: detecting a sliding action generated by triggering a touch screen in real time when the terminal is in a calling state, and determining whether the sliding action is valid; when the sliding action is valid, acquiring a first projection of the sliding track in a horizontal direction and a second projection in a vertical direction; and adjusting the sound volume based on a preset correspondence between the first and second projections and the sound volume.