The utility model relates to a power transmission line live-line work tool and relates to a quad-bundled conducting wire retaining hook comprising a support rack (1), two hanging hooks (2), two wire retaining hooks (4) and a stop spring (10). The quad-bundled conducting wire retaining hook is characterized in that the support rack (1) is shaped like a bar, the two hanging hooks (2) are respectively and movably connected to two ends of the support rack (1) through screw bolts (3) and screw nuts (6) that are matched to each other, the wire retaining hooks (4) respectively consist of a fixed hook and a movable hook, the fixed hook is integrated with the support rack (1), the movable hooks is movably connected to the support rack (1) through a rivet (5), and a tip end of the fixed hook is connected to a stop spring pin seat (7) through a screw. The quad-bundled conducting wire retaining hook also has other characteristics. The effects of the quad-bundled conducting wire retaining hook are that the wire retaining hook is easy to operate and is strong in safety and reliability, work efficiency is effectively improved, labor intensity of work personnel is lowered, safety of work personnel and equipment can be fully guaranteed, and equipment and work personnel accidents can be prevented.