The invention provides a positioning bending mechanism with a scale and a segmented bending device for a spine orthopedic rod, belongs to the technical field of surgical
medical instruments, is used for pre-bending the spine orthopedic rod before an operation, and comprises a base component, a fixed clamping component, a sliding clamping component, a positioning
carriage component and a rotary cylinder component, according to the core working principle, the longitudinal position of a bending point is determined through a linear sliding rail and a side ruler of the linear sliding rail, a bending plane is set through an angle adjusting ruler of a rotating cylinder
assembly, and the bending displacement amount is preset and monitored in real time through a displacement
measuring instrument installed on an adjusting rotating cylinder; during operation, the bending bolt is screwed to push the bending clamping seat to apply pressure to the orthopedic rod until the deformation of the orthopedic rod reaches a preset value; according to the device, preoperative three-dimensional planning is converted into quantifiable operation in three dimensions of
linearity, angle and displacement, closed-
loop control from measurement positioning to accurate bending is achieved, and the accuracy, efficiency and
repeatability of orthopedic rod forming are remarkably improved.