The invention discloses a power distribution automation terminal fixed value online verification method, which solves the problem that terminal fixed value setting is unreasonable. The method can automatically identify a terminal, the fixed value setting of which is unreasonable and gives an alarm to remind relevant personnel to modify the terminal fixed value to ensure reasonability of the fixed value of each terminal, provides a solid fixed value protection foundation for successful fault processing of FA, and ensures normal power supply of enterprises and residents to the maximum degree. The method is characterized in that when meeting power distribution automation terminal fixed value online verification starting conditions, starting online verification; obtaining the number and states of target line automation terminals from a power distribution automation system master station, and judging whether the value is consistent with a value before setting; if so, judging that the fixed value of the automation terminal is correct, or otherwise, re-verifying the theoretic fixed value of the automation terminal; judging whether the theoretic fixed value of the automation terminal is consistent with an on-site fixed value of the automation terminal obtained by the master station; and if so, ending the validation process, or otherwise, giving an alarm.