In order to eliminate the ice coating disaster of the power grid , an ice-melted steel core aluminum stranded wire structure embedded in an insulation layer is studied , and the principle of online ice melting technology using the line operating current to realize under continuous power is briefly introduced. Aiming at the structure of the wire, this paper analyzes the physical process of ice melting from the perspective of heat transfer, establishes a simple mathematical model of the wire melting under no gravity, and deduces partial temperature distribution analytical formula when the wire reaches the steady state of ice melting. Finally, the steel core aluminum stranded wire embedded in the insulation layer is custom designed to conduct the ice melting experiment. The experimental result verifies the effectiveness and feasibility of the wire melting ice.