Abstract:With the deepening of the reform of the power system, the future power generation, power transmission and distribution, and power distribution industry will change fundamentally, and the way of supervision of power grid enterprises will also change. Power grid enterprises must improve their competitiveness with lower costs, higher efficiency and better services. Using big data mining technology to explore based data value, break the barrier of the professional, promote department linkage, can prompt effective transformation of ex post monitoring to pre warning and provide strong support for scientific management and decision-making. By using big data mining technology, we can find out the potential correlation among indicators and build a risk warning network. Once the index changes are found, other related indicators would be automatically warned in advance. It is beneficial to establish a lateral synergy mechanism, break professional barriers, and timely respond effectively to various departments for improving the level of power supply enterprise operational efficiency.