A data processing method includes obtaining a path setting parameter and a display window setting parameter of a desktop child window, where the path setting parameter includes a save path of one or more objects inside the desktop child window in a non-system partition, and the display window setting parameter includes a display window size, a display position, and a display manner; creating a desktop child window operation thread; generating, by using the desktop child window operation thread, a desktop child window corresponding to the display window setting parameter, and pointing an object operation pointer of the desktop child window to a storage area corresponding to the path setting parameter in the non-system partition; and injecting the desktop child window operation thread into a system desktop operation thread that is currently running on an operating system, so as to display the desktop child window on a system desktop.