The invention involves the decoupling method and device for smart substation SCD model information, which belongs to the field of smart substation SCD model design technology. The invention obtains all internal division information in the substation and the IED information in each internal through the analysis of SSD configuration in SCD documents; IED model configuration contents are withdrawn from SCD documents and are reorganized according to SCL standard format to form the interval BCD document. The invention provides an information section with clear interval logic, reduces the application complexity as well as misconfiguration and maloperation risk of the SCD documents and is more able to satisfy the efficient application and regulation demands required by the smart substation for SCD documents in the period of commissioning, operation maintenance, reconstruction and expansion.