The utility model belongs to the electric power construction utensil, in particular to jumper clamp bolt fastening tool, ratchet spanner one (5) and ratchet spanner connect with two round pin axles (8) between two (6), ratchet spanner two (6) is equipped with hinge (12) with knuckle (4) junction, be equipped with spring holder (10) in ratchet spanner's (5) middle part inboard, it hangs round pin (11) to be equipped with the spring in ratchet spanner's two (6) middle part inboard, be equipped with between spring holder (10) and spring string round pin (11) spring (9), circle in ratchet spanner two (6) be equipped with turn shape prevent changeing pin (7), be equipped with the positive and negative regulating switch of ratchet (13) on ratchet spanner (5) and ratchet spanner two (6), the positive and negative regulating switch's of ratchet (13) the overhead on -off control stay cord ring (14) that is equipped with in both ends, connect stay cord (15) in on -off control stay cord ring (14), jumper clamp bolt fastening tool's part can be dismantled, reliability convenience for carrying, the operation is thus simple, time saving and labor saving, and a work efficiency is increased.