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localizing the pipeline leaking with rapidity and exactness is of vital importance in detecting leaking. GPS's sync pulse is utilized to intensify the synchronization of data gathering signals of the sensors. By conversing sample frequency and time-label, the negative compression wave velocity of up and down leaking site on pipeline is identified respectively, as a result, the difference between the time-label is acquired and thus the leaking site is identified. The more frequent the sampling is, the higher the precision of the localization is. But the high frequency of sampling will result in the increase in data collecting, thus reduce the velocity of leaking detection.