Phase-to-phase spacer insulator

The invention relates to a phase-to-phase spacer insulator, which comprises a mandrel, and is creatively characterized in that: connection fittings are pressed at two ends of the mandrel; grading rings are arranged on rod body parts of the connection fittings; and at least one umbrella skirt section and at least one sheath section are injection-molded on the mandrel. The sheath section and the umbrella skirt section can be injection molded by directly using the conventional die, so that extra new dies do not need to be purchased; furthermore, a creepage distance and an arc distance in the phase-to-phase spacer accord with the standard in China; and the production cost is reduced.