The invention relates to a single-loop transmission line integrated inter-phase damper spacer, so as to provide a transmission line inter-phase damper spacer capable of reducing the vibration amplitude of wire ice shedding, weakening bad dynamic effects generated by wire ice shedding on a fitting and a tower, and effectively prevent an ice shedding flashover accident. According to the technical scheme, the single-loop transmission line integrated inter-phase damper spacer is characterized in that the inter-phase damper spacer comprises three composite insulators and a damper, wherein one end of each composite insulator is in one-to-one correspondence connection with one of three wires; the damper is connected with the other ends of the three composite insulators; and each composite insulator comprises a composite material mandrel, a silicone rubber umbrella skirt string serially sleeving the composite material mandrel, a metal wire clamp connecting one end of the composite material mandrel and the wire, and two aluminum alloy grading rings fixed on the composite material mandrel respectively and abutting against two ends of the silicone rubber umbrella skirt string.