The ground electrode is in direct contact with soil conductor, its role is to the lightning current into the ground, making energy security diffuser mine spilled into the earth. The current domestic power transmission project mainly galvanized steel, copper and copper clad steel as a ground material. When a large area of the city can not be grounded, or mountain foothills, construction difficult, grounded and technology can not achieve the reduction in resistance when grounding resistance requirements, non-metallic ground electrode are obvious advantages.