The invention discloses a multi-source data verification method for a power dispatching automation system. The method is characterized by comprising the following steps: S01, setting a unique symbolic ID of each measuring point in the power dispatching automation system, and setting the parameter and information table of each channel, wherein the data ID of acquired data at an identical measuring point of different channels is the ID of the measuring point; S02, comparing the differences among different acquisition channels and state estimated values of the data at the identical measuring point in real time on the basis of the data IDs in the system, wherein data of a fault source is not considered in comparison; and S03, recording the difference values of each measuring point ID among different data sources, adding the inconsistent count of data on the measuring point with 1 when the difference values satisfy a set condition, and transmitting alarm information in case of inconsistent multi-source data of a current measuring point ID when the count satisfies a set condition. The possible risk of data error caused by a large amount of multi-source data switching is solved effectively, and the data verification efficiency of the system is increased.