Abstract: The advance in the study of toughening modification of PVC in recent years was reviewed with the emphasis on the modification by elastomer, nano-particles, fiber, elastomer/inorganic particles, and green fillers. It was pointed out that PVC composites had broad application prospect. The challenges which need further exploring included low-cost nanocomposites, the toughening mechanism of PVC composites, the hybrid effect of different fillers and their synergetic mechanism, different varieties of WF modified PVC.