With the increase in international exchanges, and proposed the development of the localization of imported molds, and foreign-funded enterprises supporting the mold of its international standard requirements, on the one hand in the standard formulation of attention as the adoption of international standards or advanced foreign national standards, including the adoption of advanced corporate standards; as covers mold manufacturers need to constantly strive to innovate and expand domestic market, prompting rapid development of mold, and continuously improve the quality of the mold, to meet the demand in the market. Sewage covers mold has the following characteristics: 1, anti-theft: the mold using polymer chemical composites. Molded from high temperatures, because no secondary use value, with the characteristics of a natural anti-theft. 2, corrosion resistance, anti-aging: Die by the National Chemical Building Materials Testing Center, with a significant acid, corrosion resistance, aging index reached three or more, longer service life. 3. Security: mold steel stents used, even in the face of destructive load, not crushed, with anti-fall function. 4, high precision: high precision molds, cover manufactured precision, complex standards. 5, nice. Die nice, manufactured cover only beautiful, so for landscaping also has certain advantages.