Geotextile 1: isolation The polyester staple fiber needle punched geotextile is used to isolate building materials (such as soil and sand, soil and concrete) with different physical properties (particle size, distribution, consistency and density, etc.). Make sure that two or more materials are not lost or mixed, maintain the overall structure and function of materials, and strengthen the bearing capacity of structures. 2: Filtration (reverse filtration) When the water flows from the fine soil layer to the coarse soil layer, the polyester staple fiber needle punched geotextile with good air permeability and water permeability is used to make the water flow through and effectively carry the soil particles, fine sand, small stones, etc. to maintain the stability of the water and soil engineering. 3: The drainage polyester staple fiber needle punched geotextile has good water conductivity, which can form drainage channels inside the soil body to drain the excess liquid and gas in the soil structure. 4: The reinforcement uses polyester staple fiber needle punched geotextile to enhance the tensile strength and deformation resistance of the soil, enhance the stability of the building structure, and improve the quality of the soil. 5: When the protective water flow washes the soil mass, it can effectively diffuse, transmit or decompose the concentrated stress, prevent the soil mass from being damaged by external forces, and protect the soil. 6: The combination of puncture prevention and geomembrane becomes a composite waterproof and anti-seepage material, which plays the role of puncture prevention. High tensile strength, good permeability, air permeability, high temperature resistance, freezing resistance, aging resistance, corrosion resistance, and moth resistance. Polyester staple fiber needle punched geotextile is a widely used geosynthetic material. Widely used for reinforcement of railway subgrade, maintenance of highway pavement, sports hall, dam protection, isolation of hydraulic structures, tunneling, coastal beach, reclamation, environmental protection and other projects.