Abstract: Analyze the issues that should be paid attention to during transformer installation. Including whether the transformer is in place, inspection of the hanging cover of the body, analysis of oil injection back to the cover, installation of accessories, transformer debugging, etc. The installation and debugging of GIS mainly analyzed the issues that should be paid attention to during installation. Including primary circuit DC resistance test, gas chamber sealing inspection, and micro water content analysis. Provide reference for engineering and technical personnel.