The invention discloses a method for controlling the using duration of a terminal as well as a mobile terminal. The method comprises the following steps: the using duration of the terminal is calculated in a preset limit time period; and the terminal is locked when the using duration exceeds a preset threshold value in the preset limit time period. Therefore, the terminal operation duration of a user in a specified time period can be controlled effectively, good living habit is established under assistance, the user uses the terminal in a healthy manner, influence on the life and body health of the user due to long-time addiction to the terminal is prevented, and the user experience is improved.