The synthetic routes, materials properties and future applications of clay-polymer nanocomposites are reviewed. Nannocomposites are composite materials.that contain particles in the size rang 1-100 nm. The particles generally have a high aspect ratio and a layered structure that maximizes bonding between the polymer and particle. Adding a small quantity of these additives (0.5%～5%) can increase many of the properties of polymer materials, such as tensile characteristics, heat distortion temperature, scratch resistance, gas permeability resistance, and flame retardancy. This new type of materials may be prepared via various synthetic routes comprising exfoliation adsorption, in-situ intercalative polymerization and melt intercalation. In this paper we report the new method for preparation EPDM-clay nanocomposites. The EPDM-clay nanocomposites were prepared by using two different approaches (direct and indirect). It is found that there is no difference between both methods but the direct method is easier The synthetic routes, materials properties and future applications of clay-polymer nanocomposites are reviewed. Nannocomposites are composite materials. Containing particles in the size rang 1-100 nm. The particles generally have a high aspect ratio and a layered structure that maximizes the bonding between The polymer and particle. Adding a small quantity of these additives (0.5% ~ 5%) can increase many of the properties of polymer materials, such as tensile characteristics, heat distortion temperature, scratch resistance, gas permeability resistance, and flame retardancy. new type of materials may be prepared via various synthetic routes including exfoliation adsorption, in-situ intercalative polymerization and melt intercalation. In this paper we report the new method for preparation EPDM-clay nanocomposites. The EPDM-clay nanocomposites were prepared by using two different approaches (direct and indirect). It is found that there is no difference between both methods but the dire ct method is easier