Embodiments of this application provide a split-screen display method and an apparatus. The method includes: displaying a first interface; receiving a trigger operation for an identifier of a first application; displaying the identifier of the first application in a first state; receiving a trigger operation for a control used to display a second application in a floating window; displaying content of the first application in full screen and displaying content of the second application in a floating window; and when a trigger operation for moving the floating window to a first split-screen region is received, displaying the content of the second application in the first split-screen region of a second interface, and displaying the content of the first application in a second split-screen region of the second interface. The terminal device can implement quick screen splitting, so that flexible screen splitting in a plurality of scenarios is implemented.