Existing analyses of conductor-icing melting often assume uniform icing, whereas actual conductor icing is radially non-uniform. This paper calculates the wind pressure during icing, analyzes the natural icing morphology, and develops an ice melting model for non-uniform icing. It also explores the effects of icing shape, wind speed, and thermal conductivity on critical ice melting current. Results show that dry growth icing exhibits radial non-uniformity, with increased icing thickness on the windward side, approximating a semi-elliptical shape. The icing pattern significantly affects conductor temperature and wind speed distribution. As the icing’s short axis decreases, the critical ice melting current rises. Increased wind speed or decreased ambient temperature also significantly raises the melting current. Furthermore, reduced thermal conductivity increases the temperature gradient and enhances discrepancies in melting current between the windward sides. These findings are applied to analyze the ice melting process of a 500 kV line, offering insights for practical conductor de-icing decisions.