The utility model discloses an automobile exhaust purifier belongs to the automotive exhaust purifying technique, including exhaust gas inlet, a tail gas export and a stainless steel round section of thick bamboo, exhaust gas inlet is connected with a stainless steel round section of thick bamboo, a stainless steel round section of thick bamboo and tail gas export are connected, be equipped with in the stainless steel round section of thick bamboo rather than wooden fiber filter element coaxial and that the diameter is the same, load nanometer cerium oxide catalyst on the filter core, be equipped with little round hole in the middle of the wood fiber filter element, be equipped with insulating plug on the outer wall of a stainless steel round section of thick bamboo, the last electrode line that is equipped with of insulating plug, the one end of electrode line is connected with the external power source positive pole through insulating plug, the shape of electrode line is " L " type, the other end of electrode line is established in the little round hole in the middle of the wooden fiber filter element, mainly be applied to on the car.