Fault location system for distribution lines

The utility model discloses a fault location system for distribution lines. The system comprises fault probes, sub-processing devices, a central processing device and a monitoring processing device, wherein each fault probe is mounted on a branch line at a cable branch; each sub-processing device is mounted beside the corresponding cable branch, receives the coding information of the corresponding fault probes and sends the processed information to the central processing device through a wireless network; the central processing device is connected with the monitoring processing device and an information emitting device; a signal source is arranged at one end of a cable; and the central processing device as well as the monitoring processing device includes a main control chip, a keyboard and a display. The utility model has the advantages that through wireless network transmission, the shortcuts of a distribution network and single-phase earth fault points can be rapidly detected and located within a few minutes after occurrence, so as to greatly shorten the fault point inspection time, enable the maintenance personnel to quickly arrive at the site for troubleshooting and power restoration, and greatly improve the reliability of power supply.