The invention discloses a power distribution network power failure management system, which is applied to an OMS system, and comprises an information layer comprising a power utilization and acquisition system, a production management system and a power distribution network automation system; an analysis layer which comprises a safety conflict check unit, a dual-power conflict check unit, an accompanying stop analysis unit, a repeated power failure check unit and a reliability check unit; an integration layer which comprises a power failure plan updating unit for increasing or modifying powerfailure information of the power failure plans and a power failure plan integration unit for integrating all the power failure plans according to whether the power failure ranges are overlapped; and the execution layer comprises a scheduling unit for scheduling all the power failure plans and a scheduling control center for executing the power failure plans according to a scheduling result of thescheduling unit. Parameter information related to power grid safety power failure factors is obtained through the analysis layer, then power failure information is added or modified for the power failure plan, it is guaranteed that the power failure plan is executed timely and reliably, and the probability of potential safety hazards in operation and power failure of the power distribution networkis reduced.