The invention discloses a secondary virtual loop visualization system based on an SCD complete model, and the system comprises a network communication module which enables a GOOSE message to be analyzed into a GOOSE real-time model for output; a model analysis module which receives an SCD file, supplements and connects an optical cable model to form an SCD complete model, and analyzes the SCD file to form a secondary system virtual loop model; a map and model mapping module which receives the secondary system virtual loop model, and builds the mapping relation between physical connection and a logic link and the mapping relation between the logic link and a function loop; and a visualization display module which receives the mapping relation between the GOOSE real-time model and the map and model mapping module, and employs the map and model integration technology to carry out the secondary loop visualization display based on the complete SCD model. The system can locate a specific physical link and the impact on the protection of the function of a secondary loop according to the abnormal condition of a GOOSE message, carries out the visual display, and provides reliable technical guarantee for the safety operation of an intelligent transformer station.