The application discloses a preoperative incision positioning device for spine minimally
invasive surgery, which comprises a support, a transverse positioning
assembly transversely and slidably connected to the support and a longitudinal positioning
assembly longitudinally and slidably connected to the support, the transverse positioning
assembly comprising a scribing plate, a connecting rod component and a screw rod, the scribing plate being arranged on the opposite side and being rotatably connected to the two ends of the connecting rod component, the connecting rod component being arranged in a rhombic shape, and the screw rod being arranged at the proximal end of the rhombic connecting rod in a bidirectional thread, the proximal end of the rhombic connecting rod being driven to move towards the center, and the distal end of the rhombic connecting rod being driven to move away from the center, the longitudinal positioning assembly being provided with disc bodies capable of being vacuum adsorbed at the two ends and being provided with a gear set at the middle for driving the support in the same direction. The scribing plate is transversely driven by the screw rod and the connecting rod component, the
screw thread drive itself has a certain damping, the movement and fixation are facilitated, the
screw thread drive is continuously driven, and thus the scribing plate is conveniently transversely finely adjusted and positioned.