The invention provides a compressor and a manufacturing method thereof. The compressor comprises a housing, a motor and compression part, wherein the motor and the compression part are accommodated in the housing; the motor comprises a crankshaft; the crankshaft is used for transmitting rotating force of the motor into the compression part to compress a refrigerant; the compression part comprises an air cylinder, a first bearing and a second bearing, wherein the first bearing and the second bearing are separately arranged at the two ends of the air cylinder, the first bearing is positioned at one end, close to the motor, of the air cylinder, and co-define a compression surface with the air cylinder, and supports the crankshaft; the silencer comprises a silencing main body and a side wall, wherein the silencing main body is positioned between the motor and the first bearing, and is connected with the first bearing through a positioning part; and the side wall surrounds the silencing main body and is used as one part of the housing. The compressor avoids the problem that the first bearing of a compressor in the prior art is eccentric, so that noises, generated under high rotation speed, of the compressor (especially a variable-frequency compressor) are reduced.