Tensioning method and tensioning tool for rope of surgical instrument

The invention belongs to the technical field of medical instruments, and discloses a tensioning method and a tensioning tool for a rope of a surgical instrument, the rope is tensioned by adjusting the relative position of a first driving wheel and a second driving wheel in the circumferential direction of a driving shaft, and the tensioning force of the rope is detected through a torque sensor; the rope is tensioned until the tension force of the rope meets the requirement, after the first driving wheel and the second driving wheel are locked to the driving shaft, the rope is kept tensioned, and then the torque sensor and the connecting structure which do not belong to the structure of the surgical instrument are detached. According to the rope tensioning device, the rope is tensioned before the first driving wheel and the second driving wheel are locked to the driving shaft, and a structure for assisting in tensioning cannot be reserved in the surgical instrument after tensioning is completed, so that the ro