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The invention relates to a line fault locator comprises a plurality of pulse generators, an interface unit, an alarm unit, a display unit, and a processor unit connected to the plurality of pulse generators, the interface unit, the alarm unit, and the display unit respectively; wherein the line fault locator is a radar type line fault locator for identifying line fault location on transmission lines without a line trap; wherein the line fault locator further comprises a GPS satellite receiver connected to the processor; and wherein the plurality of pulse generators comprising a Phase A pulse generator, a Phase B pulse generator, and a Phase C pulse generator; said Phase A pulse generator, Phase B pulse generator, and Phase C pulse generator connected to the processor. This line fault locator allows to save time in determining faults, reduce operating costs and reduce impact on users caused by power failure.