Due to the internal pressure and other environmental effects, the pressurized water pipe has potential problems such as leakage and burst. Since there is a certain pressure in the pipe, the leakage point will cause the inner pipe walls to vibrate when the pipeline leaks. Thus in this paper, a new method is proposed to monitor the pressurized water pipe with a distributed optical fiber vibration sensor(DOFVS) based on the phasesensitive optical timedomain reflectometer. The indoor test results indicate that the proposed method can detect the aperture which is equal or larger than 4 mm for a steel pipe with DN91 cm×EN2 cm and 0.4 Mpa inner pressure. The field measurement results show that, the leaking signal could be effectively acquired when the leakage rate is larger than 11 L/s, where the pipe is DN200 cm×EN2 cm steel made pressure pipe and the inside pipe pressure is around 0.27 MPa. Besides, we adopt the wavelet threshold denoising method to effectively suppress the high frequency noises in the monitoring signal, and this method achieve good results.