The invention provides a parameter adjusting method and a mobile terminal, and relates to the technical field of mobile communication. The parameter adjusting method comprises the steps of detecting pressure change in a through hole; adjusting a preset target parameter of the mobile terminal based on the pressure change. By detecting the pressure change in the through hole of the shell of the mobile terminal and adjusting the preset target parameter of the mobile terminal, the through hole replaces an original physical key; and by controlling the pressure change in the through hole to adjust the preset target parameter, the function of the physical key can be realized, and the tactile impression of the physical key is also removed.