Lead breaking tool of hot-line work robot

The invention relates to the technical field of hot-line work robots, in particular to a lead breaking tool of a hot-line work robot, which comprises a cutter, a movable fixer and a sheathing device which are all mounted on a fixed rod, the sheathing device comprises a rotating ring, a connecting rod, a rotating rod and a sheathing block, the rotating ring is rotatably connected to the fixed rod, and the connecting rod is rotatably connected to the rotating ring. The connecting rod is connected with the conversion and sleeving block, the rotating rod is rotationally connected with a third telescopic rod, the third telescopic rod is fixed to the fixing rod through a fixing frame, sleeving grooves are formed in the two ends of the sleeving block respectively, and protective sleeves are placed in the sleeving grooves respectively. According to the cable cut-off tool, the cut-off end face of a cut-off cable can be wrapped through the protective sleeve, so that the cut-off end face of the cable has a good insulati