The invention provides a portable fast locator for power line faults, belongs to the technical field of power line fault detection, and solves the problems that fault points cannot be determined by the prior art which can judge fault lines only and the fault detector is immobile. The portable fast locator for power line faults comprises a voltage generator (3) and a magnetoelectric conversion alarm (4). The voltage generator (3) comprises a direct current power supply (2) and a direct current high-voltage generator (1). A cathode (10) of an output end of the direct current high-voltage generator (1) is grounded, and the direct current high-voltage generator (1) is provided with an anode I output end (9) and an anode II output end (8), and voltage difference occurs between the anode I output end and the anode II output end. The magnetoelectric conversion alarm (4) comprises a magnetic sensor head (7), a magnetoelectric conversion circuit (6) and an alarm (5). The portable fast locator for power line faults is convenient to operate and use and portable, and is provided with the direct current power supply so that fault points are judged without detaching leads and line inspection is efficient.