Abstract:With the continuous development of electronic technology, the intelligence and integration of launch vehicle electrical systems have significantly improved, and enhanced automatic control capabilities and fault tolerance. Facing demands for high-frequency launches, low-cost demands, and shortened development cycles, the electrical system of the Long MarchCZ-2D Launch Vehicle has achieved higher integration and redundancy, the circle of design, manufacture, and launch for a single mission has been shortened to five months. The Long MarchCZ-2D Launch Vehicle has been accomplished a record of 15 launches in a single year. This paper reviews the development history of the Long March 2D launch vehicle"s electrical system, focusing on its technical characteristics that fully demonstrate the integrated, modular, redundant, and holistic design approach. As a result, the reliability of the electrical system has continuously improved, enhancing the efficiency of system testing and launch operations.