The invention discloses an extra-high-voltage overhead line lightning current leakage acquisition and positioning analysis system and belongs to the lightning monitoring device technical field. The system comprises a plurality of lightning monitoring devices and a positioning centralized control host; the lightning monitoring devices are located on baseless towers of overhead lines and are used for acquiring current waveforms on grounding leads of the overhead line towers; the current waveforms acquired by each lightning monitoring devices are transmitted to the remote positioning centralized control host through the relaying of the other lightning monitoring devices so as to be processed by the positioning centralized control host; and the positioning centralized control host acquires the current waveforms transmitted by the lightning monitoring devices in real time and adopts the current waveforms as lightning strike and fault type judgment standards, and positions a tower struck by lightning through comparing the signals acquired by the lightning monitoring devices. The extra-high-voltage overhead line lightning current leakage acquisition and positioning analysis system has high lightning struck line positioning accuracy. With the extra-high-voltage overhead line lightning current leakage acquisition and positioning analysis system adopted, the accuracy and timeliness of the detection of lightning strike accidents can be improved, lightning strike fault types can be effectively distinguished, lightning protection measures can be improved in a targeted manner, and lightning strike tripping faults can be decreased.