The invention relates to a leakage point locating system of an optical fiber sensing natural gas pipeline leakage monitoring system. The leakage point locating system comprises a light source, a transmission light path part, optical fiber sensors, a photoelectric detector, and a signal collection and processing module; the optical fiber sensors are arranged on a pipe body at certain intervals, an optical fiber sensor group consists of the optical fiber sensors, and each sensor is connected to the light source and the photoelectric detector through the transmission light path and an output of the photoelectric detector is serially connected with a signal conditioning unit, a signal collection unit and a processing unit in the signal collection and processing module; a display terminal and an external interface are arranged in the output of the processing unit; the output of the signal collection and processing module is connected with a microcomputer through an external interface. The leakage point locating system of the optical fiber sensing natural gas pipeline leakage monitoring system provided by the invention can monitor either emergent or transmitted leakage signals, and has the advantages of good locating accuracy, stable property and the like.