The invention discloses a power distribution real-time data validity analytical processing system and method. The system comprises an alarm server, a validity analysis server, a data validity historical alarm memorizer, an alarm window, a local alarm memorizer, a validity analysis client terminal and a validity statistical query component, wherein the validity analysis server, the data validity historical alarm memorizer, the alarm window and the local alarm memorizer are connected with the alarm server, the validity analysis client terminal is connected with the validity analysis server, and the validity statistical query component is respectively connected with the validity analysis client terminal and the data validity historical alarm memorizer. The validity analysis server is connected with the local alarm memorizer. Classification analysis is carried out on power distribution real-time data, valid data are judged for alarm display, filtration and statistics are carried out on invalid data, the invalid data are not sent into the alarm window, the statistical result is displayed through the validity analysis client terminal, and related defects of a power distribution system secondary device are eliminated by assisting the operation and maintenance staff.