The light-weight aggregate concrete was prepared with common Portland cement, shale ceramsite, polypropylene fiber, foaming agent and other additives. The characteristics of sound absorption in the low and medium frequency range for the cement content, fiber, grain size of shale ceramsite, foaming agent, ceramsite test block, different types of ceramsite test block and series connection were studied. The results show that the single-grain shale ceramsite concrete has good sound absorption performance near 600 Hz frequency band. When preparing concrete, adding fiber and foaming agent (H2O2) can improve the internal structure of the material, which is conducive for improving the sound absorption performance of the material. The overall sound absorption performance of the series structure of ceramsite concrete test blocks with different particle sizes can be improved by nearly 80% when compared with the original test blocks.