Abstract: The overhead ground wire (including optical fiber overhead ground wire(OPGW) and ground wire support) is the weak point of lines under rainy, snowy, and frozen weather conditions. A dual factor mechanism for ground wire breakage is proposed for the first time in this paper, including two factors: increased tension caused by icing and a decrease in local mechanical strength caused by discharge temperature rise. Furthermore, a transmission line ice disaster prevention technology based on a new ground wire structure and operation mode is proposed, for example, adopting the new fiber-optic-carrying technology, significantly improving the ice load affordability of overhead ground wire, increasing the ground wire tension transform tower by tower, and adding ground wire tension insulators configured according to operating over-voltage, and adopting the anti-icing operation mode based on disassembly and assembly of ground wire jumper, etc. The proposed technology breaks through conventional anti-icing concepts and effectively reduces the probability of ground wire breakage, tower collapses, and power outages by eliminating the discharge of ground wires during ice disaster. The technology also has significant advantages such as small increase in engineering costs, small operation and maintenance workload, improved fiber optic communication safety, and implementing line status monitoring based on wire optical fiber technology.