Stirring pile for geotechnical engineering

The utility model relates to a mixing pile for geotechnical engineering, which comprises a cylindrical drill rod main body, the lower part of the drill rod main body is sleeved with a plurality of connecting rings, the connecting ring positioned on the uppermost side is rotationally connected outside the drill rod main body, and the other connecting rings are fixedly connected with the outer wall of the drill rod main body; a plurality of drilling tools are connected to the side face of the connecting ring at equal intervals. A supporting rod is fixedly connected into the drill rod body, a rotating shaft is rotationally connected to the middle of the supporting rod, a connecting rod is fixedly connected to the upper end of the rotating shaft, and the two ends of the connecting rod penetrate through the side face of the drill rod body and are connected with the connecting ring on the uppermost side of the drill rod body. A circular plate is fixedly connected to the lower end of the rotating shaft, a plurality