Insulation on-line monitoring system of power transformation and distribution room

The invention discloses an insulation on-line monitoring system for a power transformation and distribution room, which comprises: a monitored system, a special branch grounding box system and a background monitoring system; the monitored system comprises a plurality of transformers, a plurality of power distribution cabinets, a plurality of power distribution boxes, a plurality of cables and an anti-static facility; the transformer, the power distribution cabinet, the power distribution box, the cable and the anti-static facility are electrically connected with the special branch grounding box system through grounding wires correspondingly, the special branch grounding box system is electrically connected with the background monitoring system through a communication wire, and in addition, the special branch grounding box system is connected into a power transformation and distribution room common grounding grid through a grounding wire; the special branch grounding box system of the on-line monitoring system