Automobile exhaust processing unit

The utility model discloses an automobile exhaust processing unit which comprises a cylinder body. An air inlet is formed in one end of the cylinder body, an air outlet is formed in the other end of the cylinder body, the air inlet end of the cylinder body are provided with cellular carriers, first light sources are arranged among the cellular carriers, spiral carriers are arranged behind the cellular carriers, second light sources are arranged at the central shafts of the spiral carriers, and photocatalyst is arranged on the cellular carriers and the spiral carriers. A two-stage catalytic unit is adopted by the automobile exhaust processing unit to carry out reprocessing on tail gas processed by a three-way catalyst and strive to reach the low emission of tail gas polluted gas and to enable the hazard of the tail gas to the atmosphere to be reduced to the minimum degree. Due to the fact that a mature photocatalytic technology is adopted, the automobile exhaust processing unit is low in cost, durable and capable of being used in a cyclic mode many times compared with precious metal catalyst.