The invention provides a luminous keyboard and a manufacturing method thereof. The luminous keyboard comprises a keyboard bottom plate, light transmitting key caps, a transparent plate, a light source and a plurality of protruding walls, wherein the parallel protruding walls are arranged on one of the upper surface and the lower surface of the transparent plate or the upper surface of the planar light source, so that intensity of light which is projected by the light source towards a peripheral area of each light transmitting key cap is attenuated. The protruding walls can be in the shapes of I, L, U or square, so as to attenuate the projected light in a special direction; furthermore, the protruding wall can be made of a light transmitting material of a predetermined color, so that a halo around each light transmitting key cap has the predetermined color, or each protruding wall can be made of a light-proof material, so as to greatly attenuate brightness of the halo around the corresponding light transmitting key cap, so that the luminous keyboard has a special visual effect and meets the needs.