The utility model relates to a fault location device who joins in marriage monitoring of net line status, trouble early warning and location finding technique based on distributing type phasor is measured, it includes current monitoring unit, voltage monitoring unit, collects unit and main website, the load voltage of the circuit that voltage, current monitoring unit every 15min will gather duringnormal operating, electric current fixed -point data active transportation be to compiling the unit, compiles element analysis, handles and pass to the main website on the back to pass through interface display mode such as figure, curve, form in the main website, the audio -visual line status who joins in marriage the net twine way that appears. The utility model discloses with low costs, the sexual valence relative altitude can electrified simple to operate, and is non -maintaining, can enroll electric current, the voltage waveform of each monitoring point, can phase to earth fault, short -circuit fault location section take place the accurate positioning.