The utility model discloses a thermal -insulation shed protective sheath, thermal -insulation shed ceiling and thermal -insulation shed canopy body that is used for severe cold district secret agent / super high voltage transformers to install relates to severe cold district power equipment installation technical field for reinforcing thermal -insulation shed's sealing performance is with the heat preservation ability that improves thermal -insulation shed. The thermal -insulation shed protective sheath that should be used for the installation of severe cold district secret agent / super high voltage transformers includes: protection sleeve body, a seal part who establishes at protection sleeve body's first open end with establish the 2nd seal part at protection sleeve body's second open end. Thermal -insulation shed ceiling that the aforesaid is used for severe cold district secret agent / super high voltage transformers installation and the thermal -insulation shed canopy body are used for the thermal -insulation shed protective sheath that severe cold district secret agent / super high voltage transformers installed including above -mentioned technical scheme carried. The utility model provides a thermal -insulation shed protective sheath is used for going on sealing the thermal -insulation shed canopy when secret agent / super high voltage transformers installs at severe cold district personally experiences sth. Part of the body that is used for severe cold district secret agent / super high voltage transformers to install.