Abstract: NBR (nitrile-butadiene rubber) hollow fibers have been prepared by the method of dry-wet phase inversion, in which PVC(polyvinylchloride) was blended to avoid the problems of NBR because of being too viscous and too long time of phase inversion. The NBR hollow fibers may be a new lightweight and consumption reducing damping material. The mechanical property of NBR hollow fibers aroused by changing NBR/PVC mass ratio and polymer mass fraction have been studied. The results show that the damping property of the hollow fiber structure is better than that of the plate membrane structure under the same conditions. The stretching and damping property of NBR hollow fiber can be optimized by changing NBR/PVC mass ratio and polymer mass fraction. The damping peak temperature of NBR hollow fiber decreases by increasing the NBR/PVC mass ratio. When polymer mass fraction is 25% and mass ratio of NBR/PVC is 80∶20, the damping factor of NBR hollow fiber is the largest, which is 0.78.