A fault information statistical analysis system of distribution network is developed based on multi source and isomerism data environment over backwardness of the present city distribution network construction. The target of dynamic monitoring distribution network operation mode of Shanghai city has been realized by mining and intelligent processing the fault information, equipment operating data, equipment condition data under different season, different load and different operation mode in power dispatching management system (OMS), products management system (PMS) and trouble call management system (TCM). Realities barriers of multi-disciplinary, cross-unit and inter-regional are opened up in the WAN private network. Distribution upgrade projects, such as distribution operation maintenance, technical planning and network frame optimization, are then guided through the fault information statistical analysis system of distribution network.