Abstract: At present, the actually radial positioning method of the advanced rotor spinning supporting device is to support the rotor pole using the wedge-shaped crack formed by two pairs of rotating support wheels which are along with the direction of axis. The advantage of this technique is to achieve high speed of the rotor by using low-speed bearing,thereby reducing the requirement of the bearing and prolonging its life-span as well.While putting this in real practice,the rotor pole applies too much pressure on the supporting wheels and this will result in the premature wear of the wheel′s surface.This paper introduces a method to improve the rotor spinning supporting device,this improved device not only reduces the pressure on the wheel′s surface and effectively prolong its life span,but also reduces flexural deformation of the rotor pole and increases the dynamic stability of the spining system.