Abstract: By analyzing the application requirements of the Beidou satellite navigation system in Chinese power industry, comprehensively considering issues such as ensuring the infrastructure, transportation, power supply, communication, land acquisition and subsequent operation and maintenance of Beidou ground-based augmentation station, this paper proposes a site selection method of Beidou ground-based augmentation station in the substation. Besides, the feasibility of constructing Beidou ground-based augmentation station in substations under complex electromagnetic environment is demonstrated based on conducting electromagnetic interference test and analysis in substations with different voltage levels of 35 kV~220 kV. The exclude suggestion of relevant technical indicators within the current national standard of the existing Beidou ground-based augmentation station are also proposed.