Abstract: Based on Coal Mine Safety Regulations and combined with actual site,the article proposed a method using grounding system of copper coated steel wire to instead of grounding system of galvanized flat steel.It systematically introduced connection and installation method of main components,and made grounding shake test.The test results were in line with the requirements of safety regulations.The method can well sovle the actual that coal mine can not welding construction,and improve the efficiency of installation work and reliability of grounding system.