A distributed fiber temperature measurement system based on Raman scatter and optical time domain reflecting(OTDR)is used to detect and locate the leakage of water pipeline.Firstly,the temperature resolution of the system and the temperature difference at the leakage point are analyzed.Secondly,the sensing fiber with the length of 200 m and 700 m are used to locate the leakage of water pipeline,and the detection signal is processed by wavelet transform.Finally,missing alarm rate(MAR) of the detection system is compared and calculated.The experimental results show that the distributed fiber temperature measurement system operation is stable and can identify the water pipe leakage,and the positioning error is less than or equal to 1 m.