In order to solve the difficult problem on wavelet basis selection for the processing and analysis of rock acoustic emission signal,the characteristics of rock acoustic emission signal are analyzed in detail,on basis of this,the characteristics of wavelet basis that is fit for the processing of rock acoustic emission signal are generalized,and it is determined in theory that the wavelet basis Db4 in Daubechies wavelet group can satisfy the requirements of rock acoustic emission signal processing.At last,the processed rock acoustic emission signals in some practical project are used as reference signals and added with white noise,then the acoustic emission signals before and after wavelet analysis is analyzed with correlation analysis,the results show that the wavelet basis Db4 in Daubechies wavelet group is an effective wavelet basis for rock acoustic emission signal processing.So it lays a foundation for the processing of rock acoustic emission signal and the exact determine of Kaiser point.