A light guide plate includes a bottom surface and a light emitting surface disposed opposite to the bottom surface. The light emitting surface sags down and forms a hollow, which is filled with a plurality of light-emitting quantum dots (QDs), with the light emitting surface capped with a cover film, so to seal the the plurality of light-emitting QDs in the hollow. The present invention also proposes a backlight module having the light guide plate and a liquid crystal display using the backlight module. The present invention forms a hollow on the top surface of a flat body of the light guide plate. The hollow is filled with light-emitting QDs, which can enhance the color gamut of the display backlight. At the same time, the side walls surrounding the hollow can be narrowed so that it is easier to realize the narrow edge design of the backlight module.