The invention provides a power transmission line insulator lightning stroke flashover fault addressing apparatus which comprises a sudden current sensor and an acquisition terminal. The sudden current sensor is arranged on an electric wire and is connected with the acquisition terminal through a conductor; the acquisition terminal is arranged on a telegraph pole; and the acquisition terminal is provided with a battery, a radio-frequency communication module, a 3G communication module and a solar panel, wherein the battery is a silicon energy rechargeable battery. Electromagnetic data received by the sudden current sensor is analyzed and processed by the acquisition terminal, and then the analysis result is sent to background through the 3G communication module, thereby realizing automatic power transmission line fault point determination.