The vibration sources were located at 80 cm,50 cm and 20 cm underwater respectively,the vibration characteristics of underwater sound sources can be obtained by laser coherent detection with 1000 Hz vibration frequency.The extracted signals were processed and analyzed based on the wavelet decomposition and reconstruction,multi-scale analysis and Wigner-Ville(WV) distribution.On the basis of(WV) distribution,Pseudo Wigner-Ville(PWV) distribution and Smooth Pseudo Wigner Ville(SPWV) distribution were added for signal analysis.For the generated cross interference in WV distribution,it was processed by Choi-Williams time-frequency distribution and the Margenau-Hill spectrum distribution.The results show that the combination of wavelet analysis and WV distribution can achieve the signal de-noising and feature extraction effectively.