The invention relates to an IEC61850-based communication component and application component data interface method. The method comprises the steps of initializing resolution configuration files; putting data into a shared memory according to classified formats, and associating and mapping the data to corresponding regions of a real-time database through addresses; and connecting an external application device, connecting a system according to each protocol, assigning a value to a real-time database interface according to a format of an interface protocol, an IEC61850 server communicating with a client, mapping and associating the data to the shared memory according to different services, a real-time database interface application program transmitting different messages according to different functional data, converting into protection measurement and control protocol formats, transmitting to the external application device, and achieving the function of information interaction with a substation secondary device. The invention can complete interface processing between IEC61850 data and the database and various advanced application data pools directly, can cope with the development needs of large power grids and intelligent stations, and has an important practical significance for the access of existing equipment.