The invention discloses a station area line loss fine-management system, and belongs to the field of power supply management. The system includes a data source, a data platform, a diagnosis platform and a deficiency elimination platform. The data source includes importing of raw data of an EDCM system and a marketing system. The data platform realizes screening on the raw data. The diagnosis platform carries out preliminary diagnosis classification on line loss data after screening, and further diagnosis and deficiency elimination task assignment are carried out by professional managers. The deficiency elimination platform carries out deficiency elimination tasks by all departments, and uploads processing to a data recording platform. According to the station area line loss fine-managementsystem, the fine management is realized on all the line loss deficiency elimination tasks, and reasonable circulation, timely processing and closed looping are carried out according to service processes; and through station area line loss fine-management, on the one hand, improvement of overall management and control capability of power network enterprise line loss management can be realized, andon the other hand, maximization of enterprise resource utilization can be realized. The system can be widely used in the fields of power supply management and line loss management.