Abstract: Analysing some problems existing in single face damper, A new type of three-dimension damper using double faces for squzeezing oil film has been advanced and designed in this paper. The theory and tests show that this kind of damper is able to overcome the weakpoints of the past one and adjustable to the damping ratio, has provided a method or device for the actul use of the damper in the cutting system. A number of cutting and grinding tests show that this hind of damper can greatly increase the accuracy of cutting and grinding faces.