Abstract:At present, the power-off users of power supply enterprises have realized automatic access, online analysis and intelligent judgment.The medium-voltage power supply reliability operational data management and quality improvement have made great progress. However, due to the large scale of medium-voltage distribution network equipment, involving a wide range of professionals, and long data transmission chain, the accuracy and completeness of the reliability medium-voltage power outage event are limited by various factors, which have an impact on the statistical analysis and application of reliability indicators for power supply。This paper is based on the entire process of power failure event operation data management, through research and analysis of the business systems related to the medium voltage power outage event and data interaction design, and the use of big data technology and power grid models to achieve real-time analysis of medium-voltage operation data and intelligent completion of power outage events to ensure The integration integrity and accuracy of power outage events have been effectively improved。