The invention discloses sound-absorption sound-insulation compound non-woven cloth with high density and low density laminating. The sound-absorption sound-insulation compound non-woven cloth with high density and low density laminating comprises n+1 layers of high-density non-woven cloth and n layers of low-density non-woven cloth; sound-absorption and sound-insulation effects of the cloth can be adjusted by densities and thicknesses of the layers of non-woven cloth layers and the n value; the light high-efficiency multilayered-structure compound non-woven cloth is formed by using high and low alternation of the densities of the layers of non-woven cloth.