▎ 摘　　要

NOVELTY - Chromium-reducing cementing aid comprises grinding aid shell, reducing agent, protective agent, penetration enhancer and water. The reducing agent is sodium thiosulfate, specific surface area of the grinding aid shell is more than 700 m2/g. The grinding aid shell is carbon nano-tube, molecular sieve, gas-phase silicon dioxide and graphene, preferably carbon nano-tube and molecular sieve. The protective agent comprises alkylol amine, bisulfite, saccharide and derivative. The penetration enhancer comprises polyatomic alcohol, epoxy soybean oil and mineral oil. USE - The chromium-reducing type cement grinding aid is useful in building material. ADVANTAGE - The grinding aid designs a new grinding aid load structure, the matching of the tubular and the cubic structure and defining specific specific surface area can carry sodium thiosulfate and other components into the cement to exert the effect of reducing the pressure and grinding. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a preparation method of the chromium-reducing cement grinding aid.