Lofting rod for pile foundation engineering

The utility model belongs to the technical field of building construction instruments, and discloses a lofting rod for pile foundation engineering, the lofting rod comprises a main rod and a cylinder, a supporting plate is arranged at the top end of the main rod, an auxiliary rod is movably arranged in the main rod, and the lower end part of the auxiliary rod penetrates to the inner side of the cylinder and is rotatably connected with the inner wall of the cylinder; a spiral groove is formed along the lower end of the auxiliary rod, a set of supports are fixedly welded to the outer side of the cylinder, supporting legs are hinged to the inner sides of the supports, arc-shaped blocks are fixedly welded to the ends, close to the spiral groove, of the supporting legs, and a set of convex teeth are arranged along the outer edges of the arc-shaped blocks at equal intervals; and the convex teeth are meshed with the spiral grooves. The inclination angles of all the supporting legs can be synchronously adjusted by re