The utility model discloses a plug -in insulating bar, including working head and insulator spindle, the working head is including the portion of pushing up, time hook portion and connecting rod, thetop at the connecting rod is fixed by the portion of pushing up, it fixes on the connecting rod to go back to hook portion, even there is first fixed disk the bottom of connecting rod, first fixed disk is the disc, follows on the first fixed disk radially to be equipped with a plurality of central fixed slots as initial point one -tenth radially distributed that use, the top of insulator spindle is equipped with the second fixed disk, the second fixed disk also is the disc, is equipped with the protruding muscle with fixed slot looks adaptation on the second fixed disk. The utility model has the advantages that: working head and insulator spindle are connected through two fixed disks, and two fixed disks can rotate suitable angle according to actual branches of tall trees position, and rethread fixed slot and protruding muscle collocation form relatively fixed to be convenient for adjust go back to hook portion and operate to optimum position, greatly reduced the degree of difficulty of cable and branches of tall trees separation, accelerated the separation progress.