Abstract:The seismic energy is powerful,so it has extremely destructive force on power grid. On August 8,2017,a 7. 0 - magnittute earthquake hit Jiuzhaigou County of Sichuan province. It made great damage of some important equipment in 110 kV Jiuzhaigou substation of Aba electric power supply company,which caused the total power loss of the station. The relevant geological and grid data in the earthquake are collected. The damage of important equipment in Jiuzhaigou substation caused by the earthquake is analyzed. The influence of regional geological damage around Jiuzhaigou substation is described by satellite remote sensing data,and the vibration isolation and shock absorption measures for the important equipment are put forward.