Wire repairing device and method for overhead transmission line robot

The invention relates to the technical field of power transmission line equipment, in particular to an automatic opening and closing passive progressive winding type overhead power transmission line robot wire repairing device for an overhead power transmission line robot, which comprises a supporting part, a rotating part, an opening and closing part and a monofilament feeding part, the rotating part is hinged to the supporting part through a bearing sleeve; the opening and closing part is hinged to the rotating part through a pin shaft and can be opened and closed relative to the rotating part, and the opening and closing part and the rotating part are fixed through a buckle mechanism when the opening and closing part is closed; the monofilament feeding part is fixed on the outer side surface of the rotating part; when the rotating part and the opening and closing part are relatively opened, the thread hanging part is used for thread hanging or thread loosening, and when the rotating part and the opening an