Silencing device, exhaust aftertreatment assembly and agricultural machine

The utility model relates to a silencing device, an exhaust post-processing assembly and an agricultural machine, and relates to the field of exhaust post-processing, an exhaust mesh ring of the silencing device is provided with an exhaust pipe mounting port located in the middle and a plurality of meshes arranged around the exhaust pipe mounting port, and the interior of a shell is divided into a first chamber and a second chamber; the lower end of the exhaust air outlet pipe sequentially penetrates through the shell, the first cavity and the exhaust pipe installation opening and is in sealed connection with the exhaust mesh ring, the end portion of the lower end is closed, and a plurality of exhaust holes are formed in the side wall of the exhaust air outlet pipe located in the first cavity. The exhaust aftertreatment assembly comprises a silencing device, and the agricultural machine comprises the exhaust aftertreatment assembly. The silencer has the beneficial effect that the first chamber and the second