Abstract: Aiming at Wang-Hua Oil Pipeline of Xinjiang Oilfield, a suit of oil pipeline leakage detection and location system including hardware and software is developed. The authors put forward the theory and implement method to realize leakage detection and location. Based on Visual Basic 6.0, a suit of oil pipeline leakage detection and location software that applies wavelet transform and GPS technology is compiled. The practice indicates that the capability of this system is steady and reliable, and the precision of leakage location is less than 1 % of the length of pipeline.