Exhaust system capable of improving NVH performance of whole vehicle

The invention discloses an exhaust system capable of improving the NVH performance of a finished automobile, and relates to the technical field of automobile exhaust systems, the exhaust system comprises an automobile body and an exhaust pipe, the exhaust pipe is hung on a chassis of the automobile body, and the outer wall of the tail end of the exhaust pipe is sleeved with a sleeve rotationally matched with the exhaust pipe; according to the adaptive noise reduction concept implemented in the method, the variable quantity of sound can be neutralized in the time period, namely, the variable quantity of the sound along with the accelerator is reduced, and different noise generated by the accelerator change is made to be close to the similar frequency as much as possible; therefore, discomfort of a driver and passengers caused by frequent change of sound along with an accelerator is avoided, the vibration effect fed back to a vehicle body by an exhaust system is weakened, vehicle body vibration caused by the ex