The slewing motor has flexible speed and torque regulation capabilities, which can be dynamically adapted to the needs of the working scenario. By adjusting the oil flow entering the motor through the flow valve of the hydraulic system, stepless speed change of the slewing speed can be achieved: the flow can be increased to speed up during light-load operations (such as empty bucket slewing), and the flow can be reduced to increase torque during heavy-load operations (such as full bucket slewing) to avoid motor overload. At the same time, the buffer structure inside the motor can suppress sudden speed changes, prevent the upper body from being impacted by inertia, and ensure operational stability and equipment service life.