A liquid crystal grating and a manufacturing method and a driving method therefor, and a spliced screen including a liquid crystal grating are disclosed. The liquid crystal grating includes: a first substrate and a second substrate arranged opposite to the first substrate; and liquid crystal molecules filled between the first substrate and the second substrate. The first substrate, the second substrate and the liquid crystal molecules are provided to define at least one grating unit. Each of the grating units includes: a display region; a frame region surrounding the display region; a first frame electrode located on the first substrate and arranged corresponding to the frame region; and a second frame electrode located on the second substrate and arranged corresponding to the frame region. The first frame electrode and the second frame electrode are configured for forming a voltage difference when displaying in the display region, so as to control deflection of the liquid crystal molecules in the frame region, such that light rays scattered into the frame region are emitted out from the frame region of the second substrate. The above liquid crystal grating enables a seam of a spliced screen to have a certain display brightness, thereby improving the display effect of the spliced screen.