Grouting boosting device utilizing propelling force of drilling machine

The utility model discloses a grouting boosting device utilizing the propelling force of a drilling machine. The device comprises an orifice pipe, a booster and a drill rod, the booster comprises a first baffle, a belt pad, a second baffle, a drill rod female head, a screw and a nut, one end of the drill rod female head is an internal thread end, the other end of the drill rod female head is welded to the second baffle, and the first baffle, the belt pad and the second baffle are sequentially and concentrically arranged and connected; the first baffle and the second baffle have the same diameter; the diameter of the belt pad is greater than that of the first baffle; the diameter of the belt pad is matched with the inner diameter of the orifice pipe, the belt pad is in close contact with the inner wall of the orifice pipe, and the booster can advance or retreat along the inner wall of the orifice pipe; and the other end of the drill rod is in threaded connection with the internal thread end of the drill rod fe