Abstract: Distribution network construction management faces challenges including multiple operational stages, significant risks, and inefficient manual control. Digital twin technology provides an innovative solution for automated construction management by creating a high-fidelity mapping between physical distribution networks and virtual spaces. The system establishes a five-layer architecture encompassing physical layer, data layer, model layer, application layer, and interaction layer, achieving breakthroughs in key technologies such as multi-source data integration, 3D scenario modeling, intelligent progress tracking, dynamic risk assessment, and optimized resource scheduling. Experimental results demonstrate that the system achieves 94.3% accuracy in construction progress recognition, reduces safety alert response time by 67%, decreases manual inspection workload by 82%, and enhances overall management efficiency by over 58%, providing robust technical support for smart distribution network development.