Propelling scraper

The invention relates to the field of medical instruments, in particular to a propelling scraper. The propelling scraper comprises a fourth operating rod and a cutting knife formed at one end of the fourth operating rod, the fourth operating rod is cylindrical, and a fifth cutting edge is machined at the end, away from the fourth operating rod, of the cutting knife. The interior of the cutting knife and one end, close to the cutting knife, of the fourth operating rod jointly form a third accommodating space for accommodating residual intervertebral disc; the outer diameter of the cutting knife is equal to the outer diameter of the fourth operating rod, the inner diameter of the cutting knife is smaller than the inner diameter of the fourth operating rod, and a step face is formed at the connecting position of the cutting knife and the fourth operating rod. The fifth cutting edge cuts off the residual intervertebral disc connected with the vertebral body, and meanwhile the removed residual intervertebral disc