Removal of the internal lumbar spinal fixation is performed under epidural or general anesthesia. The patient is placed in the prone position with the original surgical incision, and the position of the transverse link is determined in the middle of the spine, then the caudal cap of the transverse link and the transverse link are removed, then the position of the four arch nails is determined on both sides, the vertical spinal muscles on both sides are split longitudinally, then the caudal caps of the four arch nails are removed in turn, the connecting rods on both sides are removed separately, and then the four arch nails are removed in turn. After the wound is irrigated, the skin is sutured layer by layer.