▎ 摘　　要

NOVELTY - Preparing concrete water reducing agent, comprises (i) reacting equimolar succinic anhydride and diethanolamine to obtain AB2 type monomer, (ii) reacting nuclear molecule triethanolamine with AB2 type monomer to obtain hydroxy-terminated polymer, (ii) reacting hydroxy-terminated polymer with succinic anhydride to obtain carboxy terminated polymer, and (iv) reacting the carboxy terminated polymer with lignin sulfonate and graphene to obtain hyperbranched lignosulfonate. USE - The concrete water reducing agent is useful for construction industry containing graphene (claimed). ADVANTAGE - The concrete water reducing agent: solves coagulating effect produced by lignin sulfonate; improves adding amount of concrete water reducing agent; improves water reducing effect; and reduces side effects.