The utility model relates to a 220kV double-interval modular HGIS electrical wiring device. The 220kV HGIS power distribution system comprises double buses arranged outdoors and a 220kV HGIS power distribution device for double-bus segmented wiring, on the basis of conventional HGIS double-row arrangement, two intervals are combined into a set of HGIS module by adopting a GIL pipeline, a group ofbus sleeves are shared, and the bus sleeves are connected by adopting a double-fracture bus isolation switch; the shared group of bus bushings are two SF6-air bushings which share one group of connecting open type buses at intervals and are configured by adopting a double-fracture bus isolating switch; according to the utility model, the double-fracture bus isolation switch configuration is adopted, so that the mutual influence of two intervals under various working conditions can be eliminated, and the free combination of a single main transformer, a circuit, a bus coupler, sections and bus equipment intervals can be realized.