Composite geomembrane is mainly divided into: one cloth one film, two cloth one film and multi-bu film, the base cloth is acupuncture geotextile, can also be used Filament woven fabric, plastic woven fabric. The production process not only maintains the good mechanical properties of the geotextile, but also makes the thickness of the composite product film uniform, and the peeling strength is high, avoiding the formation of pores and blisters on the film, greatly improving the impermeability of the film, and pressing the film surface. The flower treatment increases the friction coefficient of the film formation, which not only improves the stability of the anti-seepage project, but also facilitates the construction.