The invention relates to a mobile terminal as well as an apparatus and method for switching lock-screen wallpaper. The mobile terminal includes a processor, a memory and a display; the processor reads first pre-cached lock-screen wallpaper when the screen of the mobile terminal is extinguished, and generates second new lock-screen wallpaper and sends the second new lock-screen wallpaper to the memory, so that the second lock-screen wallpaper to be read can exist in the memory when the screen is extinguished next time; the memory caches lock-screen wallpaper; and the display displays lock-screen wallpaper which has been read when the screen of the mobile terminal is lit. With the apparatus and method for switching the lock-screen wallpaper provided by the invention adopted, the lock-screen wallpaper can be fast switched when the screen is lit or extinguished fast and frequently, and picture flicker can be avoided. Since the wallpaper of a lock-screen pictorial needs a certain time to be loaded when being switched, if a user fast turns on and turns off a screen, picture flicker in wallpaper switching can be brought about, and as a result, the problem of poor user experience can be brought about, while, with the apparatus and method adopted, the problem can be solved.