Abstract: Aimed at the disadvantage of the traditional wavelet transform maximum modulus (WTMM) denoising method not to identify all signal characteristics, an improved denoising method based on the WTMM technique was proposed, by using adaptive decomposition dimension instead of dyadic scales, to meet the signal denoising demands. The improved WTMM method and the traditional WTMM method were applied to analyze the original blasting vibration signals. The denoised signal by the improved WTMM method is coaxially more distinct from the detected signals and has better continuity, and the signal-to-noise ratio is improved from 17.25 to 20.16. It is suggested that the improved WTMM method has better denoising effect than the traditional WTMM method.