The rotary mechanism of the Shandong Hengwang Foundation Spiral Piling Machine is driven by a medium-speed hydraulic motor through a reducer. With the cooperation of four hydraulic stabilizing cylinders, the piling machine can achieve 360-degree rotation. Due to the hydraulic motor's characteristics of stable power, stable operation, low rotational inertia, and high start-up efficiency, the piling machine has the advantages of smooth rotation, no impact, no vibration, good overall stability, and a long service life.