Geomembrane and Geotextile is to paste geotextile on one or both sides of the membrane to form a compound geomembrane. Its form is one cloth and one membrane, two cloths and one membrane, two membranes and one cloth, etc. As the protective layer of the geomembrane, the geotextile protects the impermeable layer from damage. Composite geomembrane is widely used in channel seepage prevention engineering.