With the implementation of China's "dual-carbon"target and increasing investor focus on ESG metrics. environmental costs must be integrated into the comprehensive cost analysis of open-pit mine roads. This study constructs a cost analysis model for the comprehensive cost of open-pit mine roads using the CRITIC method, incorporating 10 factors: material, labor, machinery, maintenance, carbon emissions, dust suppression, environmental toxicity, transport efficiency, component lifespan, and tire wear. Taking the Zijinshan Gold-Copper Mine as a case study, objective weights for each indicator were derived through information load analysis to mitigate inter-indicator correlations. Calculated quantitative comprehensive road costs are: gravel roads 98.6 yuan/m?, cement roads 108.5 yuan/m , surface-modified roads 62.9 yuan/m²,and overall modified roads 67.7 yuan/m2. Compared to gravel and conventional cement roads, modified roads exhibit significant cost advantages, with surface-modified roads achieving a reduction in comprehensive costs of over 36 %.