Abstract: The analysis of blasting vibration signal is an important basis for the determination of blasting parameters. Taking the excavation engineering of Taoyuan downcast shaft in Shanxi Lu’an Group Gucheng Coal Mine as the background, the blasting vibration signals of well wall in the construction process of shaft construction are analyzed by HHT. We carry out the EMD decomposition for blasting signals, get the IMF components of signals, and transform the principal component signals by Hilbert and obtain envelope curve, accurately identify the actual millisecond interval of blasting detonator, and obtain the Hilbert frequency spectrum of the signals. The analysis shows that the HHT method is adaptive and suitable for fine feature extraction of vertical blasting signals.