The invention discloses an IEC61850 standard based information protection system source-end modelling method. A information protection sub-station performs transformer substation complete modelling byutilizing a transformer substation system configuration tool conforming to the IEC61850 standard to generate an SCD model file which includes a primary device and topology structure, a secondary device and an association relationship of the primary device and the secondary device of the transformer substation; an information protection main station and the information protection substation exchange model information through the SCD file; and the information protection main station automatically generates a database which includes primary device information, secondary device information and anassociation relationship between the primary device information and the secondary device information of the transformer substation by utilizing the SCD file to provide a model basis for application analysis of the information protection, thereby realizing source-end modelling of the information protection system. The IEC61850 standard based information protection system source-end modelling method can efficiently solves a problem that the main station in the information protection system cannot perform deep analysis on the information protection due to that 103 convention is lack of model information.