A cable tie tool, wherein in the cable tie tool comprises: a first operating unit having a clamping end and an operating end disposed opposite to each other; a second operating unit having two guiding holes aligned with each other; and a cutting end and an adjusting end disposed opposite to each other; a pivoting shaft mounted within the two guiding holes, pivotally connected with the first operating unit and the second operating unit, and being movable along the two guiding holes; a torsion spring having two ends respectively abutting against and pushing the first operating unit and the second operating unit respectively such that the clamping end of the first operating unit abuts against the cutting end of the second operating unit; a cutting assembly having an activating element pivotally connected to the second operating unit and abutting against the pivoting shaft; and a cutting element movably mounted in the second operating unit and having a cutting edge positioned toward the cutting end of the second operating unit, and the cutting element driven by the activating element to alternately move toward the cutting end and the adjusting end of the second operating unit; and an extension spring having a first end connected to the activating element; and a second end connected to the second operating unit; wherein, the extension spring is stretched such that the activating element blocks the pivoting shaft from moving along the two guiding holes, wherein each one of the guiding holes is curved and has a first guiding sections, a curved section, and a second guiding section sequentially arranged and communicating with one another; the first guiding sections of each one of the guiding holes has a first terminal end positioned toward the cutting end of the second operating unit and extends toward the adjusting end of the second operating unit; the curved section of each one of the guiding holes extends toward the cutting end of the second operating unit; and the second guiding section of each one of the guiding holes has a second terminal end positioned toward the cutting end of the second operating unit, characterized in that in each one of the two guiding holes, a length of the first guiding sections is shorter than a length of the second guiding section and since the length is shorter than the length, the pivoting shaft and the cutting element move a sufficient distance to cut the cable tie. a first operating unit having a clamping end and an operating end disposed opposite to each other; a second operating unit having two guiding holes aligned with each other; and a cutting end and an adjusting end disposed opposite to each other; two guiding holes aligned with each other; and a cutting end and an adjusting end disposed opposite to each other; a pivoting shaft mounted within the two guiding holes, pivotally connected with the first operating unit and the second operating unit, and being movable along the two guiding holes; a torsion spring having two ends respectively abutting against and pushing the first operating unit and the second operating unit respectively such that the clamping end of the first operating unit abuts against the cutting end of the second operating unit; a cutting assembly having an activating element pivotally connected to the second operating unit and abutting against the pivoting shaft; and a cutting element movably mounted in the second operating unit and having a cutting edge positioned toward the cutting end of the second operating unit, and the cutting element driven by the activating element to alternately move toward the cutting end and the adjusting end of the second operating unit; and an activating element pivotally connected to the second operating unit and abutting against the pivoting shaft; and a cutting element movably mounted in the second operating unit and having a cutting edge positioned toward the cutting end of the second operating unit, and the cutting element driven by the activating element to alternately move toward the cutting end and the adjusting end of the second operating unit; and an extension spring having a first end connected to the activating element; and a second end connected to the second operating unit; a first end connected to the activating element; and a second end connected to the second operating unit; wherein, the extension spring is stretched such that the activating element blocks the pivoting shaft from moving along the two guiding holes, wherein each one of the guiding holes is curved and has a first guiding sections, a curved section, and a second guiding section sequentially arranged and communicating with one another; the first guiding sections of each one of the guiding holes has a first terminal end positioned toward the cutting end of the second operating unit and extends toward the adjusting end of the second operating unit; the curved section of each one of the guiding holes extends toward the cutting end of the second operating unit; and the second guiding section of each one of the guiding holes has a second terminal end positioned toward the cutting end of the second operating unit, characterized in that in each one of the two guiding holes, a length of the first guiding sections is shorter than a length of the second guiding section and since the length is shorter than the length, the pivoting shaft and the cutting element move a sufficient distance to cut the cable tie.