The present invention relates to a noise-reducing silencer for engine. It includes silencer shell body, intake pipe and exhaust pipe which are positioned on the silencer shell body, the silencer shell body is divided into left and right two cavity bodies by means of resonance noise-reducing microporous plate, the outlet of said intake pipe is positioned in right cavity body, and the inlet of said exhaust pipe is positioned in left cavity body. The external shell of said silencer is an elliptical structure. |