Drilling auxiliary device for hole wall reinforcement and hole body straightening

The utility model belongs to the technical field of cast-in-situ bored pile construction equipment, and particularly relates to a hole wall reinforcing and hole body straightening drilling auxiliary device which comprises a central shaft, a drill bit and a drill rod, wherein two ends of the central shaft are respectively butted with a drill bit and a drill rod corresponding to a cast-in-situ boredpile; the plurality of reinforcing rings are distributed along the axial direction of the central shaft; the reinforcing ring and the central shaft are connected and fixed through a plurality of connecting ribs, and the reinforcing ring and the central shaft are coaxial; the plurality of metal pipes are uniformly mounted and fixed along the circumferential direction of the reinforcing ring; all the metal pipes are parallel to the center shaft, and the two times of the farthest distance between the outer walls of the metal pipes and the center of the reinforcing ring are equal to the designeddiameter of the cast-in-si