The invention discloses a power distribution network automation system, which comprises an IEC61968-based information exchange bus. The IEC61968-based information exchange bus is connected with an enterprise GIS application system, a production management system, a marketing management system, an enterprise resource management system, a special server, a protection server, a superior dispatching automation system, a power distribution main station, a special transformer and public detection system, a residential electricity information acquisition system, a standby power generation system anda user terminal. The power distribution main station is connected with power distribution substations through a signal transmission network; and the power distribution substations are connected with FTU and DTU through the signal transmission network. In the process of realizing distribution automation, the system emphasizes communication with customers and receives feedback information from the customers in time, makes statistics on geographic positions and electricity consumption information and the like of the customers, and meanwhile, adopts the standby power generation system for assistance in the cases of power shortage or power failure in local areas to ensure stability of electricity consumption of the customers.