The utility model discloses a silencer of making an uproar falls in exhaust and engine thereof, inside and with casing inner chamber separate into at least one baffle of different cavities with setting up in the casing including the casing, offset to the shaozheng be provided with on the baffle of the intake pipe of ware a plurality of be used for dispersing the air current that admits air form turbulent vortex physically, carry out the vortex body dispersed through be provided with in can be to the silencer air current on the baffle of silencer, at the during operation, can disperse and come getting into in the silencer air current, carry on the amortization through silencer amortization structure on next step again, can further reduce the noise that exhausts on present silencer noise cancelling effect's basis, reach better noise cancelling effect.