Automobile exhaust pipe with tail gas filtering function

The invention discloses an automobile exhaust pipe with a tail gas filtering function. The automobile exhaust pipe comprises an exhaust pipe body and an air inlet pipe, wherein one side of the exhaustpipe body is communicated with the air inlet pipe; the other side of the exhaust pipe body is communicated with a filtering pipe through a flow guide pipe; the inner surface wall of the flow guide pipe is welded with a fixed circular disc positioned on the horizontal axial line of the flow guide pipe through flow guide plates in equal angle distribution; a rotating shaft is movably connected witha position at one side of the fixed circular disc and positioned inside the filtering pipe; a spiral blade is welded on the outer surface wall of the rotating shaft in the horizontal direction; a plurality of sound absorption convex blocks are uniformly distributed on the inner surface wall of the filtering pipe; a vacuum cavity is formed inside the casing of the filtering pipe. The automobile exhaust pipe has the advantages that the spiral blades can rotate under the tail gas circulation effect; the rotating shaft is driven to rotate; through the rotating effect of the spiral blade, the contact area between the active carbon adsorption plate and the tail gas can be effectively increased, so that the adsorption efficiency is improved; harmful gas in the tail gas can be efficiently adsorbed; the goals of filtering and environment protection are achieved.