Abstract: Power distribution lines are responsible for the "last mile" of power transmission to users. Due to the lack of contact devices in some distribution network lines, the reliability of power supply to users is reduced because load transfer cannot be performed during construction operations. Actively exploring the application of emergency power supply vehicles in the load transfer of distribution network lines is the key to optimizing the construction processes and ensuring the reliability of power supply. For the construction of the 10kV Tongjiang Line project, this paper adopts the "Live work and Generation operation" power transfer mode to conduct research on the application of emergency power supply vehicles in the distribution network transformation. It provides new ideas and models for the load transfer of distribution networks.