The invention discloses a daily statistics-based power distribution automation index quick calculation method. The method comprises the steps of collecting a warning record of a third-region databaseof a master station once per hour; judging whether one-day warning collection is finished or not, and if yes, matching a one-day warning record with a terminal account, and performing statistics on results such as an actual online duration of a terminal on that day, a remote control success frequency, a total remote control frequency, a remote signaling action correctness frequency, a total remotesignaling shift frequency and the like; performing daily statistics calculation of a power distribution automation index related to a terminal online rate, a remote control success rate and a remotesignaling action correct rate; determining a query time range of the index; and based on terminal daily statistics in the query time range, calculating the power distribution automation index. The method shortens the index calculation time when the query time range is flexible, the calculation is accurate, and foundation is established for the improvement of distribution automation application.