The invention discloses a feeder line disconnection power outage range identifying system and method based on distribution transformer terminal information. The system comprises a measurement automation system, a grid distribution power outage range analyzing host (22) and a grid distribution scheduling management system (23), wherein the measurement automation system comprises a distribution transformer terminal (211) and a measurement automation system master station (212). The feeder line disconnection power outage range identifying system and method based on the distribution transformer terminal information has the advantages of saving a large number of grid distribution terminals and reducing cost. Meanwhile, the feeder line disconnection power outage range identifying system based on the distribution transformer terminal information can automatically judge the grid distribution power outage range affected by feeder line disconnection through identification characteristics, can save identification via artificial experience and accordingly can rapidly inform maintenance personnel for repair.