Abstract: The papper proposes a solution for coal mine supply safety monitoring system based on IEC 61850 standard. Its characteristics and system functional framework are elaborated. The technologies, such as anti-override trip, fault location and fault diagnosis, small current fault line detection technology, that can affect the safety of power system are especially expounded. The scheme is successfully applied to Chaochuan Mine power supply system, which proves validity and feasibility of the scheme. It also improves the monitoring and automation level of mine power supply system.