Motor vehicle silencer

The invention discloses a motor vehicle silencer, and relates to the technical field of vehicle silencer manufacturing. The motor vehicle silencer comprises a shell with a gas inlet pipe and a gas outlet pipe, internal space of the shell is divided by a first separating plate with holes and a second separating plate with holes into a first cavity, a second cavity and a third cavity in the gas inlet direction, the tail end of the gas inlet pipe is plugged and sequentially penetrates through the two separating plates to extend into the third cavity, and pipe sections with a plurality of through holes are distributed at the positions, in the second cavity and the third cavity, of the air inlet pipe respectively; pipe sections with a plurality of through holes are distributed at the positions, in the first cavity, the second cavity and the third cavity, of the gas outlet pipe respectively, a high frequency sleeve is arranged outside the pipe section, in the third cavity of the gas outlet pipe, with the holes, and damping materials are arranged between the high frequency sleeve and the pipe wall of the gas outlet pipe. Compared with the prior art, the problems that an existing silencer is short in service life and high in production cost are solved.