Abstract: This paper applies the theory of wavelet analysis to the field of blasting seismic signals processing,for promoting the application of wavelet analysis in the blasting engineering. As well as in the frequency domain, wavelet has good local character in the time domain, its step of time-frequency domain becomes fine little by little while the high frequency is analyzed, so it is better to process the high varying signals such as blasting seismic signals by the wavelet analysis than by the Fourier analysis. The authors summarize the theory and application of wavelet analysis,find the basic wavelet for blasting seismic signal analysis,and analyze a concrete engineering example.