The invention, which belongs to the field of power system automation technology, relates to a modeling method and system for a secondary virtual loop of an intelligent substation. All access block information from all IED devices are extracted to generate a goosesmv model; all connecting line information is extracted from an SCD to generate a connecting line model including titles of IEDs which virtual terminals at the two ends of connecting lines belong to, virtual terminal references, associated station control layer signal IDs, and associated pressing plate station control layer signal ID information; and then according to the generated goosesmv model and the connecting line model, a virtual loop model including virtual loop link state information is generated according a principle of belonging to a same virtual loop of connecting lines belonging to a same access control module of a same IED. According to the invention, under the circumstance that the SCD file is configured correctly and the monitoring data base is complete, model generation as well as mapping between information of related press plate states and link states and information points in a monitoring system configuration base can be completed automatically, thereby providing a complete and convenient model support for visual displaying of the virtual loop.