PVC resin is one polarity non-crystalline sex polymer, between the molecules has the strong force, is a hard and brittle materials; Anti-impact intensity inferior. Join impact modifier, impact modifier of elastomer particles can reduce total silver lines, and using particle triggered stress its own deformation and shear zone, prevent silver lines expansion and growth, to absorb the impact of the material body can jiaziyu, so as to achieve the purpose of impact resistance. Modifier of particles is small, so as to facilitate increased unit weight or unit volume in the number of modified agents, make its effective volume share increase, thereby enhancing the disperse stress ability. At present is widely for organic anti-impact modifier.