The long spiral rotary jetting and mixing is a new technology, by which the pile is constructed with mechanical mixing soil under high-pressure jetting by the modified long-spiral drill. The rotary speed of the long-spiral drilling is slow, but the lifting speed is quick. The soil can’t be cut fully by the high-pressure cement, which causes the low pile body uniformity, low strength and poor water-stop effect. While the converter is used in the long-spiral drilling, the lifting and falling speed can be adjusted in need of construction for fully mixing, better pile body condition and better water-stop effect. At the same time, the movable block is saved; the appliance becomes more simple and convenient with smaller generator power and drilling current for energy saving.