The design of the centrifugal compressor impeller speed-raising system is introduced.The final output speed reached to 60 000 r/min by the means of high-speed flat and gearbox

and drived the 50 kg simulation impeller rise-and-fall smoothly.The overspeed test indicates that the high speed flat sliding rate is controlled within 4% and the noise less than 80 dB.The system has been put into use more than one year and run well.