The present invention relates to the field of power grids, and particularly relates to an optimization method for active reporting of a power failure event concentrator in a transformer area. The method of the present invention uses a concentrator to monitor a voltage anomaly for screening effective power failure information. After the concentrator monitors the voltage abnormality, the concentrator collects a set of concentrator AC sampling voltage again. After a power failure event is determined initially, the power failure event is recorded and the total meter voltage in a transformer area is interrogated actively. After the power failure event in the transformer area is judged initially, the power failure event is reported to a master station. After a collecting master station receivesthe power failure event, the total meter voltage in the transformer area is copied for secondary judgment. If the power failure event in the transformer area is also determined in the secondary judgment, the master station sends the power failure event to a distribution network repair platform to arrange corresponding repair working personnel. The method of the present invention can improve the reliability of reporting the power failure event in the transformer area, save the resources of the master station, and strive for the time for the repair work of power failure.