GIS bushing is mainly used in GIS substation, capacitive voltage equalizing structure, glass fiber impregnated epoxy resin reinforced winding solid insulation, and the outdoor part of the bushing is free of SF6 gas, so there is no risk of gas leakage. No inspection and maintenance are required during operation, and the operation will not lead to insulation failure due to temperature change and pressure change, especially suitable for low temperature environment.