The invention discloses a compulsory circulation type vehicle tail gas purifier. According to the scheme, the compulsory circulation type vehicle tail gas purifier comprises a gas inlet pipeline and a cylindrical purifying chamber which is communicated with the gas inlet pipeline, wherein a filter layer is arranged at a communicated part of the gas inlet pipeline and the purifying chamber; an axial ceramic honeycomb plate is arranged in the purifying chamber; the ceramic honeycomb plate is used for equally dividing the purifying chamber into upper and lower parts; one end of the ceramic honeycomb plate is in contact with the filter layer; partition plates are alternatively arranged on the inner wall of the purifying chamber and the ceramic honeycomb plate; the partition plates are respectively formed into S-shaped runners on upper and lower parts of the purifying chamber; and the partition plates are symmetrically arranged in the purifying chamber in a radial direction. The invention aims to provide the compulsory circulation type vehicle tail gas purifier. By being guided by the partition plates, all of the tail gas can be introduced to the ceramic honeycomb plate, so that all of the tail gas can be purified.