Influences of different amounts of modified acrylonitrile-butadiene rubber on mech. properties of PVC paste resins were analyzed through design of test formula, sample strip preparation and performance measurement.With the increase of elastomer dosages, the tensile strength of soft PVC materials dropped, its elongation at break was improved obviously, and thus the novel modified powder acrylonitrile-butadiene rubber could improve the properties of PVC paste resins.Adding suitable amount of viscosity-reducing agent could decrease the viscosity of the paste resins and thus meet the demands of production