Abstract: Perform testing on individual centrifugal gas compressor needs to be taken after they are put into operation or repaired. Taking a gas compressor station as an example, the testing idea of individual compressor operation condition is that the inlet/outlet electric control valves are adopted to adjust the inlet/outlet pressure. The basic principle is that the inlet fluid is throttled to reduce the inlet pressure of compressor and the outlet fluid is throttled to increase the outlet pressure, thus improving the compression ratio and the loading of the compressor is made. Under the precondition of gas transmission pipeline running, flowrate can be controlled through adjusting the inlet/outlet bypass valve in the light of different running conditions. Testing process of compressor's performance and variation of inlet/outlet pressure are provided in a case. The influence of performance testing of compressor on pipeline operation is analyzed from pressure and flowrate.Resultsdisplay that the overall influence is slight, but it is bigger on branch line and equipment, which mainly focuses on the wear of pipeline and the reduction of regulator service life, etc. Attention issues on the performance testing of compressor are proposed.