Abstract: The present application is applied to data processing technique field, providing an application program privacy data protection method and an apparatus. The method includes: creating a privacy space, including creating a user interface and a data storage area that the privacy space corresponds to, the user interface of the created privacy space is the same as the user interface of the normal space; when installing an application program, it is determined whether the application program has been installed into the normal space; if the result of the determination is yes, the application program is installed into the privacy space; if the result of the determination is no, the application program is installed in the privacy space and the normal space respectively. Through the present application, it is possible to protect the privacy data of the application program in the user terminal without any trail.