Provincial and district grids are two important levels of grid in Chinas dispatching system. Higher requirements are made on the coordination of security and stability defense between the provincial and district grids. By referring to the actual need of grid operation and trend of grid development， a discussion is made on the general objective， item by item objectives for the coordination between provincial and district grids， the coordination between the two levels of grid， the coordination in all stages， and the three essentials for coordination. A coordinated defense framework for secure and stable operation is proposed. The development of the online comprehensive defense system for the integration of the provincial and district grids is tackled. The framework is of great significance for deepening understanding on the requirement of the coordination technology and for enhancement of the level of coordination between provincial and district grids.