Exhaust silencer for automobile

The utility model relates to an exhaust silencer of a heavy-duty car. The utility model comprises an air inlet pipe, an air outlet pipe and a barrel which is divided into an air inlet surge chamber, a transitional surge chamber and an air outlet surge chamber by a clapboard. Air outlets are paved on the air inlet pipe positioned in the air inlet surge chamber, and air outlets are paved on the air outlet pipe positioned in the air outlet surge chamber. A vent hole is arranged between the air inlet surge chamber and the transitional surge chamber. One end of a U-shaped inner connecting pipe positioned in the air inlet surge chamber is communicated with the transitional surge chamber, and the other end of the U-shaped inner connecting pipe is connected with the air outlet pipe. The clapboard and one side of an end cover positioned in the air inlet surge chamber is fixed with sound-damping materials. The utility model has the advantages of good noise reducing effect, long service life and beautiful appearance.