The acoustic emission signal generated by pipeline leakage has non-stationary characteristics,By using the appropriate non-stationary signal processing method to analyze it, we canIn order to effectively grasp the characteristics of different aperture leakage signals [3]. Empirical modeIn recent years, the decomposition of states (EMD) isTo study and apply a more non-stationary signal processing method, andCompared with other time-frequency analysis methods, the signal decomposition is adaptiveIt is widely used in engineering field, but the methodThere are also some shortcomings,