Addressing the issue of insufficient reliability of suspension clamp assemblies for ground wires in the heavy ice zones, this paper introduces a new type of ground wire suspension clamp, and the load-bearing characteristics of the ground wire under the impact after ice-shedding are assessed. Initially, a refined finite element model of the ground wire-suspension clamp was established and validated through true line tests. Using an actual ultra-high voltage project line as an example, the study investigates the load-bearing and dynamic characteristics of the new fittings under the impact after ice-shedding. The results indicate that the new suspension clamp exhibits good dynamic performance with flexible rotation during the ice shedding impact. Under 20 mm ice thickness, the overall stress level of the new suspension clamp remains low. However, as the ice thickness increases, the load-bearing risk of the suspension fittings increases. When the ice thickness comes up 60 mm, the stress on some components exceeds the material's yield strength, posing potential risks.