The characteristic of motion control system based on servo control unit is pointed out, and the motion control algorithm has been analyzed. In a word, a new kind of motion control algorithm based on digital servo control unit has been designed. 文章阐述了基于全数字伺服控制单元的位置控制系统的特点,并且对运动控制算法进行了分析,研究并实现了一种新的基于全数字伺服控制单元的运动控制算法。