The invention discloses a data splitting and recovery method and device suitable for a power system. The method includes: a first database and a data recovery unit are disposed in the platform layer of the power system, wherein the first database operates in an internal memory, comprises real-time mappings, of grid models and static parameters in a second database, in the internal memory, and is used for providing grid model and static parameter inquiry for a dispatching automation system. The data recovery unit is in charge of all read-write operations related to the second database, and when data write exists, historical data are stored according to time mark features and written into the second database when the second database is normal. By the method, grid model and static parameter inquiry of the power system is still available when the second database fails, a basic function is unaffected, the historical data during the failure can be recovered after the second database is normal, and data continuity and completeness are guaranteed.