The utility model relates to a reinforcing structure between insulated wire and post insulators, including post insulators, insulated wire, insulated wire sets up in the groove on post insulators upper portion, the insulated wire both ends are located outside the post insulators, insulated wire bindes fixedly through the ribbon with post insulators, between insulated wire periphery and the ribbon, at least, be provided with the one deck enhancement layer between insulated wire periphery and the groove, the enhancement layer is including setting up in the hydrophobic layer of insulated wire periphery, the setting is at the insulating layer of hydrophobic layer periphery, the enhancement layer both ends surpass each 30 mm of both sides at the position of ligature position or insulated wire and the post insulators contact of insulated wire and ribbon, the groove footpath of the diameter ratio groove of enhancement layer is big, the enhancement layer is provided with insulating self -adhesive tape or outer hydrophobic layer outward, the utility model discloses simple structure, it is equitable to set up, has improved intensity and hydrophobic ability between insulated wire and the post insulators, reduces the lightning induction overvoltage, prevents insulating built on stilts wire breakage.