Abstract: In light of the characteristics of blasting vibration signals of non-stability, short duration, and time and frequency field localization, and through the brief description of the analysis technology of blasting vibration signals, the paper concludes the features of the wavelet analysis technology. Meanwhile, based on the determination of wavelet decomposition layers and the optimal selection of wavelet packet base, energy calculation formula is used in programming in MATLAB 7.0 language environment, and the preliminary law of the energy distribution of blasting vibration signals is drawn, laying a theoretical basis for the further study on blasting vibration signals.

Key words: Wavelet packet decomposition, Optimal wavelet packet base, Frequency band, Energy distribution