The invention provides a privacy protection method and device and a mobile terminal. The privacy protection method comprises the following steps: acquiring a first grip value applied by a user, wherein the first grip value refers to grip produced when the user makes a first preset action to the terminal; judging whether the first grip value meets a first preset privacy protection condition; and entering a privacy protection mode if the first grip value meets the first preset privacy protection condition. According to the method, when the first grip value meets the first preset privacy protection condition, namely when a user of the currently used terminal is not the owner, the terminal enters the privacy protection mode, so that the personal information of the owner and other information which is undesired to be seen by other people can be protected, and the condition that the personal information of the owner is disclosed is effectively avoided.