Intelligent sound-attenuating system used for engineering machinery

The invention provides an intelligent sound-attenuating system used for engineering machinery, which is applied to the field of engineering machinery. The system comprises a case, a gas inlet tube, agas guide tube group, a gas outlet tube, a sound detecting module, a switching module and a temperature regulating module, wherein five chambers which communicate with multiple guide tubes are arranged in the case, so that noise sound waves are sufficiently rebounded and eliminated in the multiple chambers; a temperature regulating module is arranged, sound-attenuating effect may be affected by atoo high waste gas temperature, thus the temperature regulating module can be arranged for cooling waste gas and an environment in a pipeline so as to achieve a better sound-attenuating effect withina limited space as the chambers of a sound-attenuating room need to be wider for a higher temperature; and a water-cooling assembly drives a propeller to rotate through kinetic energy of waste gas, sothat a cooling agent in the