The invention provides a communication implementation method of virtual station grade IED mode between a primary station and a substation in a fault information system 61850. The method comprises the following steps: naming an IED (intelligent electronic device) and an LD (logical device) according to functions, models, voltage class and addresses based on IEC61850 Standard; establishing an SCD (station configuration description) model of the substation; shielding the IED in an application layer; establishing the virtual station grade IED of the substation; mapping the LD under the IED to themirror image LD in the virtual IED of the substation; mapping a virtual IED model to an MMS object; establishing communication link with a client/server mode based on an Ethernet TCP between the primary station and the substation; and analyzing and locating device and data information by using an MMS domain namespace and a naming rule to realize report, request, response and file services which meet IEC61850 Standard, and finally realizing communication function between the primary station and the substation. In the invention, the server of the substation requires no reorganization and modeling, and the communication function between the primary station and the substation of the power grid fault information system can be realized with smaller engineering quantity and a simple mode.