Abstract: In order to improve wavelet packet denoising effect for vibration signal of roadheader and avoid influence of noise on signal feature extraction mostly, the paper proposed a denoising method of vibration signal of roadheader based on the optimal wavelet basis selection. The method takes signal frequency spectrum as analysis basis, firstly determines the optimal decomposition layer number of wavelet packet, then selects the optimal wavelet basis function, so as to realize real-time processing of the vibration signal of roadheader with the best denoising effect. The field test results verify effectiveness of the method.