The invention provides a power grid system data interface calibration method. The power grid system data interface calibration method comprises the steps that common data exchange interfaces are calibrated, wherein a resource ID service function, a resource inquiring service function and an event service function are calibrated; operation interfaces for time sequence data management and access are calibrated, wherein a detecting system is used for calibrating a standard consistency supporting degree function and a data reading function; then, whether the common data exchange interfaces are consistent or not is judged, and whether the operation interfaces for time sequence data management and access are consistent or not is judged; if the common data exchange interfaces are consistent and the operation interfaces for time sequence data management and access are consistent, the power grid standardized data exchange interfaces are consistent; otherwise, the power grid standardized data exchange interfaces are not consistent, and debugging needs to be conducted again. According to the method, calibration is carried out in the method that the most basic functions are calibrated first, and the data exchange interfaces can be efficiently and fully calibrated in the system development process, so that the system development efficiency is improved, resources are saved, and development cost is reduced.