Abstract: Taking a 10 kV power distribution project in an industrial park in Enshi as an example, this study proposes an optimized decision-making model for high-voltage business expansion equipment selection. Engineering verification reveals that this approach significantly enhances equipment operational efficiency and power supply reliability, achieving optimal resource allocation. Post-implementation, the transformer′s expected annual average load rate increased from 52% to 71%, the system line loss rate decreased from 0.83% to 0.67%, and the fault recovery time for key circuits was reduced to under one hour. Consequently, research on high-voltage business expansion equipment selection methods can address issues such as irrational capacity configuration, insufficient techno-economic analysis, and neglect of long-term operational costs in traditional selection processes. This holds certain promotional significance for improving the quality of distribution network construction in prefectural-level power supply companies.