Abstract: According to the use and maintenance situations of Eickhoff SL500 type shearer in Shendong company,the paper analyzes and discusses un-traction fault of shearer,grounding and electric leakage faults,grounding fault of cutting system,RS-485 transmission error fault,motor encoder fault.The troubleshooting steps and methods are proposed,which is conductive to safety,stability and efficient work of coal mining,and can be good serviced for Shendong company and other coal enterprises.