The utility model is suitable for an overhead transmission line anti -waving device field of handling, provide a partitioning spacer include composite insulator, respectively connect in the right angle hanging plate at composite insulator both ends, connect in each right angle hanging plate's yoke plate and locating at least one fastener device on the yoke plate, wherein, composite insulator have at least one end pass through retractable device with right angle hanging plate connects. The embodiment of the utility model provides a partitioning spacer passes through composite insulator, the retractable device who carries out electrodeless regulation to the looks interval of wire, mutual swing joint between right angle hanging plate and the yoke plate, and the fastener device of locating on the yoke plate is fixed with lead wire gripper, make the alternate distance of each looks space kept in order to produce mutual suppression, the range of waving of wire has been weakened, and the air gap between messenger's wire keeps the within range in the permission, and then the short circuit trip -out rate of circuit between getting along with has mutually been reduced, transmission line reliability of operation and security improve.