Anto disturbance rejection controlling technique is a new controlling system method for adapting the development of numeral control era in recent years.It has high precision,rapid convergence,overshoot and anti-jamming etc,so it has wide-range in machining process.In this paper,ESO's principle is analyzed,the probability that ESO controls noise of system measurement is discussed,and active disturbance rejection controlling technique on filtering is also presented.ESO has good disturbance rejection.Some examples are given in this paper.The results show that it has fine filtering characters to high frequency noises.