Polyester filament spunbonded needle-punched geotextile, the geosynthetic material product manufactured by our company, is a new-type building material applied to geotechnical engineering and civil engineering. Such geotextile is made by use of the method of polyester filament netting and consolidating, with fiber array of three-dimensional structure. Besides excellent mechanical properties, such geotextile has excellent longitudinal and transverse drainage properties, extension properties, penetrating and filtering properties as well as excellent resistance against ageing, acids, alkalis and biological attacks. Polyester filament spunbonded needle-punched geotextiles are mainly used in national important projects (including expressway, railway, water conservancy, airport, port, reclaiming land from the sea, garbage-burying place, municipal construction, electric construction and other projects) as well as waterproof materials and floor leather and other fields. Such geotextiles also have many functions such as protection, partition, filtration, reinforcement, anti-seepage and drainage functions, hence possessing high popularization and use value.