Filament geotextile needle p unched together to get the stable 3D with highter tensile strength fabric so the tensile strength of filament is higher than that of short one. Because the fiber is soft and has a certain tear resistance, meanwhile, it has a good function of sewage filtration, reinforcement and water filtration. What are Geotextiles? Geotextiles are permeable fabrics, made from either polypropylene or polyester. When used in several different applications, mainly associated with soil, geotextiles have the ability to separate, filter, reinforce, protect, or drain. Geotextile fabrics come in three basic forms: non- woven geotextiles, woven geotextiles. Besides, use of other natural geotextiles and related studies finds mention in the paper. Man-made geotextiles based on petrochemical derivatives have doubtful eco-compatibility.