Polyester geogrid is a new kind of favorable earthwork base material to strength the road surface and roadbed, which composed of high strength polyester yarns coated with an inorganic sizing agent. It has the following performance: 1)high tensile strength,low elongation 2)tear-resistant 3) anticorrosive 4) good anti-aging and alkali-resistance APPLICATION: 1.Reinforce roadbeds in soft soil for road,railways, airfields, irrigation channels. increase of stability and loading capacity of fundus 2. Reinforce riverside,embankment and side slope 3.Strengthen the surface of the roads and bridges