The embodiment of the invention provides a mobile terminal anti-theft method and device and a mobile terminal. The method includes the following steps: when an anti-theft mode appears through triggering, starting a disguised clock prompting interface and starting a shooting service based on a front camera, and hiding a shooting interface corresponding to the shooting service in the disguised clock prompting interface; monitoring click events in the disguised clock prompting interface; after the click events in the disguised clock prompting interface are monitored, calling the front camera and enabling the front camera to shoot a current image, and stopping the alarm; and conducting anti-theft processing on the shot image. In this way, the problem that a thief cannot be found or a stolen mobile terminal cannot be found is solved, and the beneficial effect that the thief or the stolen mobile terminal can be found is achieved.