The utility model provides an engine acoustic celotex board includes outer shell (2) and foam rubber layer (3), fasten in outer shell (2) inboard foam rubber layer (3), and corresponding engine gear engagement department ab intra outwards is equipped with the damping pit on the two -layer face. It is effectual that this engine acoustic celotex board has the sound insulation, and difficult because of engine vibration produces resonance, falls the advantage that the noise effect is obvious.