Data shattering method and device

The invention provides a data shattering method and device. The method comprises the steps that it is determined that data transmission is finished, and data transmitted locally are shattered so that the data cannot be recovered. According to the data shattering method, after data transmission is finished, the data transmitted locally are shattered so that the data cannot be recovered, so that the problem that user data cannot be thoroughly deleted when the data are manually deleted and/or a terminal is restored to factory settings in the prior art is solved, and the effect that user information safety and/or user individual privacy data are more reasonably and efficiently protected against threat is achieved.