Retraction device for spine surgery

The utility model discloses a retractor for spine surgery, which relates to the technical field of medical instruments and comprises a base, first sliding grooves are formed in the middle of the front side face and the middle of the rear side face of the base, and first sliding blocks matched with the first sliding grooves are clamped in the two first sliding grooves. The upper surfaces of the two first sliding blocks are fixedly connected with square cylinders, square rods matched with the square cylinders are clamped into the two square cylinders, a plurality of evenly-distributed inserting holes are formed in the left side face of the square cylinder located on the front side, and square holes are formed in the left side face of the square rod located on the front side. According to the retraction device for the spine surgical operation, through cooperation of a handle, a rotating rod, a first thread and a second thread, the handle and the rotating rod can be used for driving the first thread and the secon