Automobile exhaust emission device with noise reduction device

The invention discloses an automobile exhaust emission device with a noise reduction device, which comprises a spiral curving main exhaust pipe, wherein an inlet pipe is arranged at the front part of the main exhaust pipe; a pair of outlet pipes is arranged at the tail of the main exhaust pipe; a detachable pulsation connecting pipe is arranged at the front end of the inlet pipe; a first noise reduction part and a second noise reduction part are arranged in the main exhaust pipe; the second noise reduction part is sleeved with the inner part of the first noise reduction part in a detachable manner. According to the automobile exhaust emission device with the noise reduction device, as the pulsation connecting pipe on the inlet pipe of the main exhaust pipe is adopted and a plurality of acoustic absorption cavities are arranged, the pulsation exhaust noise of a motor is reduced greatly; moreover, as the two noise reduction parts in the spiral curving main exhaust pipe are adopted, the exhaust noise of the motor can be further reduced. The automobile exhaust emission device is compact in structure, convenient for transformation and low in cost.