A method and apparatus for displaying an application program, and a terminal device, which are applied to the technical field of intelligent terminals. The method comprises: determining whether an application program to be currently started is displayed by means of a Freeform window (S11); if the application program to be currently started is displayed by means of a Freeform window, acquiring a display interface specified by the application program and corresponding to a work task (S12); and after the application program is started, displaying the acquired specified display interface corresponding to the work task in a Freeform window as a display interface of the application program (S13). By means of the method, the speed of entering a specified display interface corresponding to a work task can be increased.