The invention discloses an intelligent auxiliary comprehensive monitoring and D5000 comprehensive linkage platform of a transformer substation. The intelligent auxiliary comprehensive monitoring and D5000 comprehensive linkage platform comprises an intelligent auxiliary facility monitoring system, a dispatch-end video master station, an information integrated platform, a transformer substation automatic system and an isolating device. The dispatch-end video master station adopts a network high-definition ball for monitoring video surveillance inside and outside the transformer substation and meanwhile is provided with a network hard disc video cassette recorder for acquiring and uploading real-time videos, planning a warning line and a warning region of a switching station and performing intelligent analysis to produce warning signals. The transformer substation automatic system monitors a power protection device at the front end of a power grid and uploads acquired data to the information integrated platform. The transformer substation automatic system and the information integrated platform are communicated through the isolating device. The safe and reliable running of the intelligent transformer substation is ensured.