The invention discloses a cement foam sound-absorbing board. The main point of the technical scheme is that the built-in frame is placed flat on the mould, and after the short steel pipes in the built-in frame are inserted into the columns, the cement foaming agent is used to pour the built-in frame around, and the built-in The frame is completely embedded in the cement foaming agent, and it is cured according to the conventional curing method of cement products, and it is packaged as a finished cement foam sound-absorbing board; the cement foaming agent is composed of cement, high-viscosity attapulgite clay powder, water and other raw materials; After the cement foaming agent is cured, it forms an integrated whole with the built-in frame, which increases the overall strength, bending resistance and actual use effect of the cement foam sound-absorbing panel. Cement foam sound-absorbing panels can not only effectively control noise pollution, but also have the functions of heat preservation and air purification; cement foam sound-absorbing panels are suitable for installation in highways, viaducts, urban light rails, subways, factories, warehouses, public places and other facilities .