Abstract: As one important part of the rotating machinery,rolling bearings are the most vulnerable parts.Once failure occurs,it will cause great danger.According to the structure characteristics of rolling bearings,the method of AE testing was established to test different faults on rolling bearings. Through the parametric characteristics of acoustic emission, the failure of bearings under different working conditions was analyzed and compared by single parameter analysis method, historical variety analysis method, distribution analysis method and correlation analysis method.The results indicate that the AE technique could be applied to fault diagnosis and feature extraction on rolling bearings.