Against the backdrop of the dual-carbon initiative and sustainable energy development, in response to the green development needs of power grids and the global fight against climate change, there is an urgent need to develop environmentally-friendly high-voltage vacuum circuit breakers (HVVCB) as a sustainable alternative to SF6 gas. In addressing the heightened requirements for pressure resistance, insulation, and ablation performance posed by higher-voltage eco-friendly vacuum circuit breakers on traditional copper-chromium-based vacuum contact materials, this study focused on the optimization of preparation processes and performance evaluation of novel Cu-Cr alloy contacts with high chromium content. Through hot isostatic pressing (HIP) densification treatment, a comprehensive enhancement of the contact material’s properties was achieved, laying the foundation for the development of contact materials for circuit breakers rated at 126 kV and above.