Automobile emission silencer

The utility model belongs to the technical field of noise elimination devices and particularly relates to an automobile emission silencer. The automobile emission silencer comprises a cylinder body, an air inlet pipe, a silencing pipe, a main silencing pipe, an air outlet pipe, a first spacer plate, a second spacer plate, a third spacer plate and a silencing spacer plate. The inner portion of the cylinder body is sequentially divided into a first cavity, a second cavity, a third cavity and a fourth cavity through the first spacer plate, the second spacer plate, the third spacer plate and the silencing spacer plate. Silencing holes are formed in a pipe wall, located in the second cavity, of the silencing pipe. Silencing holes are formed in a pipe wall, located in the third cavity, of the main silencing pipe. Air-returning holes are formed in the silencing spacer plate. The automobile emission silencer is simple in structure and installation. Collision occurs in the process of reciprocating flow of airflow in t