The invention discloses a current ice-melting method for overhead ground wires of an electric transmission line. The method mainly includes following steps that by means of ground wire insulators, each of the overhead ground wires is down led in an insulation mode and grounded through grounding knife switches; the overhead ground wires are reliably grounded through the closed grounding knife switches when the electric transmission line is in normal operation; the grounding knife switches break, and the overhead ground wires are to ground insulation during ice melting; and a tail end of an overhead ground wire requiring ice melting is in short circuit with another nearby overhead ground wire or a shutdown transmission line, a starting end of the overhead ground wire requiring ice melting and the another nearby overhead ground wire or the shutdown transmission line are connected with an ice melting power supply to form an ice melting loop to start the ice melting power supply, and ice-melting currents are generated in the ice melting loop and used for working and heating to achieve ice melting. According to the current ice-melting method for the overhead ground wires of the electric transmission line, the ice-melting currents are loaded to the overhead ground wires to heat the overhead ground wires to rise temperatures so that covered ice on the overhead ground wires can be effectively melted.