The utility model discloses a combustion chamber of smoke intensity reduces. This combustion chamber is omega shape, and inside extension of chamber wall of its aditus laryngis department forms ellipse round dimple in the lower part of this combustion chamber to reduce the aditus laryngis diameter of combustion chamber, reduce the throat and compare. This combustion chamber of smoke intensity reduces improves to the ellipse round dimple of aditus laryngis adduction through the round dimple with former combuster, can reduce the throat and compare to reduce the smoke intensity, improve engine low -speed moment of torsion, reduce response time with higher speed, strengthen the dynamic property of car.