Combination drill tool for long screwy jet grouting and stirring pile

A long spiral rotary jetting and stirring pile composite drilling tool comprises a drill rod and a drill head connected with the bottom end of the drill rod, wherein the drill rod comprises a tubular rod body and spiral blades or/and radial stirring teeth connected to the outer peripheral surface of the rod body; the drill head comprises a tubular main body, spiral blades on the drill head , drilling teeth and nozzles; the spiral blades on the drill head are connected to the outer peripheral surface of the tubular main body; radial nozzles connected with a high pressure slip casting pipe passing through a cavity of the tubular main body are arranged in the spiral blades on the drill head, and the high pressure slip casting pipe passes through the rod body of the drill rod; and the bottom end of the tubular main body is in the shape of a closed cone, and drilling teeth are arranged on a radial line at the closed top. The utility model has strong power and torque to penetrate through a harder soil layer and mak