Tail gas dust collector

The invention relates to an automobile tail gas treatment device, in particular to a tail gas dust collector. The dust collector comprises a fixing system, a first tail gas treatment system, a second tail gas treatment system and a third tail gas treatment system. Automobile tail gas is treated in a three-step treatment mode, namely large tail gas particles are collected and gas which is subjected to incomplete reaction in an automobile engine is combusted simultaneously in the first tail gas treatment system, small-particle pollutants in the tail gas are filtered in the second tail gas treatment system, and toxic gas is oxidized and converted into non-toxic gas in the third tail gas treatment system. The dust collector is a practical automobile tail gas purifying device which reduces the discharge of the toxic gas and avoids air pollution.