The invention discloses a silencer for a high-power engine. The silencer for the high-power engine comprises a middle silencer body and side silencer bodies arranged on the two sides of the middle silencer body. Each side silencer body comprises a barrel, an air inlet tube, a transition tube and an air outlet tube, wherein baffles are arranged at the two ends of the barrel correspondingly, a sealed cavity is formed by the baffles and the interior of the barrel, and two parallel partition plates are arranged inside the sealed cavity and divide the sealed cavity into a left chamber, a middle chamber and a right chamber; and one end of the air inlet tube penetrates through the left chamber and the middle chamber and enters the right cavity, the other end of the air inlet tube is arranged on the outer side of the barrel, and the air outlet tube and the transition tube are arranged on the left side and the right side of the air inlet tube correspondingly. In this way, the silencer for the high-power engine can effectively reduce noise pollution of the high-power engine, makes noise emission of the high-power engine meet requirements, reduces noise pollution during field operation, and meanwhile can not only reduce the influences of noise radiation on the engine and the surrounding environment but also lower vibration noise.