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The electrical system of launch vehicle is mainly used for flight control, parameter measurement and fault detection. Referring to the ideas of aviation IMA platform and automobile platform, the concept of carrier rocket electrical system platform is proposed. The electrical system platform can be divided into two parts: infrastructure and extension components, among which the infrastructure is the key to determine the performance of carrier rocket electrical system. In this paper, according to the development requirements and technical characteristics of launch vehicles in China, the functional division of electrical system is analyzed, and the definition of electrical system platform and infrastructure is given. Combined with the development status of electrical system architecture of foreign advanced launch vehicles, each development stage of electrical system platform of launch vehicle is analyzed. Finally, the overall electrical system of launch vehicle in the future is summarized features.