Double-layer sound-absorption composite board

The utility model relates to a double-layer sound-absorption composite board. The double-layer sound-absorption composite board consists of a housing and a noise-proof filling material, and through holes are uniformly formed on the surface of the housing, wherein the noise-proof filling material is an aluminum honeycomb core. A honeycomb hole central line of the aluminum honeycomb core is verticalto the side wall of the housing. Through holes communicating the adjacent honeycomb holes are prepared on the aluminum honeycomb core. The double-layer sound-absorption composite board has simple structure and low cost, can utilize different sizes and colors according to the real environment, has good noise-insulation and elimination effects, and can effectively reduce 20-30% of the indoor noise;furthermore, due to the advantages of heat-insulation, water-proof and fire-proof performances and light weight, the double-layer sound-absorption composite board can be applied to different locations such as the common house, the recreation place and the large-scale equipment plant and the like.