The invention relates to the field of refrigeration compressor technology, in particular to a rotary compressor silencer. The silencer is provided with a silencing chamber with an indentation on the upper end surface of a rotary compressor flange, the surrounding of the connecting part of the silencer is provided with a gap, the vertical projection of the gap falls within the silencing chamber andthe gap is communicated with the silencing chamber; the silencing chamber arranged on the upper end surface can enlarge the silencing room of noise when passing through a silencing device, thus having better silencing effect; and the gap outside the connecting part of the silencing device is communicated with the silencing chamber. The high-pressure airflow discharged from an air outlet on the upper flange, can only be discharged from the gap communicated with the silencing chamber on the silencing device due to no other discharge ways, and the discharged high-pressure airflow is discharged from one side of the silencing device and spurted to a stator enamel winding with higher sound absorption coefficient, thus effectively reducing regeneration of coupled noise and finally reducing the compressor noise.