The invention relates to the field of power business application, and particularly relates to a power grid data real-time synchronization system based on a resource pool technology. The system comprises a first resource pool, a second resource pool, a monitoring system, a data synchronization module, and an application monitoring module. A high-level standby CDB is distributed in the first resource pool. The first resource pool is provided with a first-level CDB, a middle-level CDB and a low-level CDB, the second resource pool is provided with a high-level CDB, a middle-level standby CDB and alow-level standby CDB, the high-level standby CDB is in communication connection with the high-level CDB, the middle-level standby CDB is in communication connection with the middle-level CDB, and the low-level standby CDB is in communication connection. A system database instance state and a system database state are acquired and judged in real time. The data synchronization module is used for achieving data synchronization between the first resource pool and the second resource pool when a database instance is changed or a system breaks down, so that session connection between an application and a database is guaranteed, reliable storage of power business data can be guaranteed, and therefore stable operation of power grid business is effectively guaranteed.