Pressure adjusting system of compressor

The utility model discloses a pressure adjusting system of a compressor. The pressure adjusting system comprises a raw material air pipe, a compressor inlet buffer tank, a return gas pipe and a return gas adjusting valve. The pressure adjusting system of the compressor is characterized in that the raw material air pipe is provided with a pressure signal sensing device which is connected with the return gas adjusting valve. Compared with the prior art, the pressure adjusting system of the compressor has the advantages that limitations of hysteresis quality of compressor inlet pressure controlled by the return gas adjusting valve on the raw material air pipe and frequent and obvious fluctuation of compressor inlet pressure caused by hysteresis quality in the prior art can be avoided, an aim of realizing stably controlling the compressor inlet pressure can be truly achieved, and fluctuating frequencies and amplitudes of the compressor inlet pressure can be remarkably improved.