The film structure of the film material by the two parts of the base fabric and the coating composition. Fabric with polyester fiber and glass fiber materials; PVC and PTFE coating material. Top membrane polyester fibers covered polyvinyl chloride (PVC) and glass fibers, polytetrafluoroethylene (Teflon), polyethylene cover. The main features of the PVC material is low strength, flexibility, easy to aging, creep, poor self-cleaning, but the price is cheap, easy to manufacture, rich colors, anti-aliasing performance. To improve its performance in the surface thereof coated with a layer of Teflon-coated to improve their anti-aging and self-cleaning ability, and its life can reach about 15 years. Teflon material, high strength, elastic modulus, self-cleaning, durable, fire-resistant performance is good, but it is more expensive, difficult to fold require a higher accuracy of crop production, and life in general in more than 30 years, suitable for permanent buildings.