The paper mainly carries  out the technical analysis on the causes of high oil temperature failure prevalent  in  HV-TURBO single-stage  high-speed centrifugal blowers to put forward practical and feasi- ble measures and methods, and takes Shidongkou Sewage Treatment Factory to verify the implementation of project cases. Good achievements  are  obtained  in production practice, which further clarifies the necessity of  the  analysis  on  the reasons  of  failures  and measures, being great reference significance for the proper solution to problems of the same type of equipment  under  scheduled circumstances.