The invention discloses an intelligent substation virtual circuit automatic connection method. Based on the primary main wiring diagram and the primary and secondary device associations, the IED is automatically matched to the secondary device roles associated with the typical interval defined by the typical interval virtual loop template file, and then the virtual loop connection is automaticallyestablished for the IED according to the virtual loop group and the virtual loop keywords in the template. Using this method in intelligent substation design and configuration, You can draw the primary wiring diagram once, and after the primary and secondary device associations are configured. The implementation tool automatically configures the virtual loop connection between IEDs, avoids the disadvantages of repeated configuration of the virtual loop and manual connection, significantly shortens the system integration time, and can automatically check the virtual loop of the SCD file that has completed the configuration of the virtual loop, and check whether there is any connection error or omission.