The invention provides a light emitting keyboard and a light guide plate module thereof. The light emitting keyboard comprises a light emitting element, a thin film circuit board, a plurality of press keys and the light guide plate module, wherein the press keys correspond to a plurality of thin film switches on the thin film circuit board and are communicated with the thin film switches, the light emitting element is used for providing light rays for the light emitting keyboard, the light guide plate module comprises a first reflective layer, a second reflective layer and a light guide layer, the light guide layer is positioned between the first reflective layer and the second reflective layer, and is provided with a plurality of light emitting areas and a gap area, the light emitting areas correspond to the press keys, the gap area is positioned outside the light emitting area, each light emitting area is provided with light guide points, and the gap area is provided with a light diffusion structure.