Geomembrane, widely used in canal seepage control project. In recent years, geosynthetics in civil engineering, in particular, a large number of applications and their effectiveness in flood rescue project, causing the majority of engineering and technical staff are highly valued. For geosynthetics technology, the country from seepage, filtration, drainage, reinforcement, protection and other aspects of proposed normative technical requirements, greatly accelerated the pace of promotion and application of new materials. The material is widely used in the irrigation canal seepage control project, the combined construction practice of geomembrane application technology. Performance composite geomembrane (composite impermeable membrane) into the physical and mechanical properties of a cloth membrane and two cloth one membrane, width 4-6m, weight 200- 1500g / square meter, tensile, tear, bursting high, the product has high strength, good elongation properties, deformation modulus, acid, anti-corrosion, anti-aging, anti-seepage performance characteristics. To meet the water, municipal, construction, transportation, subways, tunnels, construction of impervious, isolation, reinforcement, crack control reinforcement, civil engineering needs. Because of its selection of polymer materials and the production process added anti-aging agent, it can be used in unconventional temperature environment. Commonly used in dams, drainage ditch seepage treatment, pollution prevention and waste treatment field. Geomembrane is on one or both sides of the film through the oven far-infrared heating, the geotextiles and geomembranes via guide rollers pressed together to form a composite geomembrane. With the improvement of the production process, there is a casting method do geomembrane process. In the form of a cloth membrane, two cloth one film, two films a cloth. [1] As of geotextile geomembrane layer of protection, so that impermeable layer of protection from damage. To reduce ultraviolet radiation to increase the anti-aging properties, preferably laying buried in France. Construction, the first to use a smaller diameter material leveling sand or clay base surface, and then laying the geomembrane. Geomembrane not stretched too tightly, buried in the soil at both ends of the body portion is corrugated, and finally in the shop geomembrane layer of about 10cm intermediate layer of fine sand or clay. Lined with 20-30cm stone (or precast concrete blocks) for the anti-scour protection layer. Construction, should try to avoid the stones hit directly on the geomembrane, preferably side to side laying protective layer construction. Geomembrane connection with the surrounding structures should be used to the pressure of the expansion anchor bolts and steel connecting parts to be painted