Power transmission line fault detection apparatus

The invention relates to the power transmission line detection field, and specifically relates to a power transmission line fault detection apparatus. The power transmission line fault detection apparatus includes a processor, a display and a plurality of fault detection apparatus, wherein the plurality of fault detection apparatus are arranged along the power transmission line in a scattered manner; each fault detection apparatus includes a voltage sensor, a current sensor and a communication unit; the voltage sensor is used for detecting the voltage to earth at the current position in the fault detection power transmission line and transmitting the voltage to earth to the communication unit; the current sensor is used for detecting the current at the current position in the power transmission line and transmitting the current to the communication unit; and the communication unit is connected with the voltage sensor and the current sensor, and is used for transmitting the received voltage information and cur