Geotextile waterproofing mats are specialized geomembranes used for artificial lakes, landfill sites, underground parking garages, rooftop gardens, ponds, oil storage facilities, and chemical storage yards to prevent leakage. They are made by filling high-expansive sodium bentonite between a custom composite geotextile and nonwoven fabric, and the needle-punched bentonite waterproof pads can form numerous small fiber spaces, preventing the bentonite particles from flowing in one direction. When wet, they create a uniform, high-density gel-like waterproof layer within the pad, effectively preventing water leakage. Bentonite waterproofing mats can be categorized by production process into: needle-punched sodium bentonite waterproof mats, needle-punched coated sodium bentonite waterproof mats, and adhesive sodium bentonite waterproof mats. The needle-punched coated sodium bentonite waterproof mat is a nonwoven geotextile coated with a layer of high-density polyethylene geomembrane on the outer surface of the needle-punched sodium bentonite waterproof mat.