The utility model relates to a filthy current collection device of power transmission line insulator. The device includes: battery, suit the insulator chain low -voltage terminal and with insulator chain closely larynx hoop, sampling resistor, filtering and amplifying circuit, treater and the communication circuit of reliable ground on the ring that dams, installation insulator chain gold utensilof laminating, dam to encircle to form with the larynx hoop and gather the port, connect filtering and amplifying circuit behind the parallelly connected sampling resistor of collection port, filtering and amplifying circuit connect the processor, treater connecting communication circuit, the battery is the ring that dams, larynx hoop, sampling resistor, filtering and amplifying circuit, treater and the power supply of communication circuit. The utility model provides a filthy current collection device of power transmission line insulator utilizes the ring that dams to bind round the filthy electric current on constitution return circuit, direct intercepting power transmission line insulator surface with the larynx. The design of this kind of special construction has the characteristics ofreliability height, precision measurement.