A kind of busbar line segment adjustment unit,Its include at least a connecting piece,One lateral external member,One adjustment part and one fit long line segment composition； The connecting piece one end in conjunction with fishing-rod tail,The other end combines a hollow form transverse direction external member； Line segment one end connection bus simultaneously wears fixation for the adjustment part,The line segment other end wears the hollow fixed what adjustment part of lateral external member Hou,So that hollow transverse direction external member and adjustment part form two-wire segment structure,And it is short by can be adjusted two-wire segment length via adjustment of displacement part,The applicable convenience of length is directly adjusted in order to the visual fishing rod length variation of bus.一種母線線段調整單元，其至少包含一連結件、一橫向套件、一調整件及一適長線段組成；該連結件一端與釣竿尾結合，另一端結合一中空狀橫向套件；該線段一端連結母線並供該調整件穿設固定，該線段另一端穿設中空橫向套件後固定於調整件，以使中空橫向套件與調整件形成雙線段結構，且由經由位移調整件即可調整雙線段長短，俾母線可視釣竿長度變化直接調節長短適用的便利性。
