Light insulating sound-proof plate molded by foaming coal ash

The utility model discloses a light insulating sound-proof plate molded by foaming coal ash. The plate comprises hard surface layers (1) and a foaming layer (2), wherein the middle layer is the foaming layer (2); and the upper surface and the bottom surface are the hard surface layers (1). The middle layer is formed by foaming the coal ash and a gelling agent together; and the two hard surface layers are inorganic non-foaming layers and have the effects of decoration, flame resistance and reinforcement. The plate is good in comprehensive performance, light in weight, heat-preserving, flame-resistant, heat-insulating, sound-proof, high in strength, environment friendly, wide in source of the raw material, i.e., the coal ash, simple in production process, low in manufacturing cost and wide in application.