A sliding rod-type lumbar vertebra hyperosteogeny grinding device, comprising a sleeve (4), sliding rods (5) being fixed to the inside of the sleeve (4) in the length direction of the sleeve (4); the sliding rods (5) are provided with a grinding motor (15) that is capable of moving along the sliding rods (5); a holding rod (1) is fixed on the top of the grinding motor (15) and extends out from the top of the sleeve (4); a hollow main shaft (14) is provided on the grinding motor (15); a grinding disc (10) is fixed to the end of the main shaft (14); several grinding sharp tapers (11) are uniformly distributed on the lower surface of the grinding disc (10); a support rod (12) is inserted into the main shaft (14), and the bottom of the support rod (12) has a tapered shape; a buffering spring (13) is connected between the support rod (12) and the main shaft (14); an air suction pipe (8) is connected to the wall of the bottom portion of the sleeve (4); an air suction device (9) is connected to the end of the air su
