▎ 摘　　要

NOVELTY - Preparing modified polyether, comprises (1) dissolving graphene is denoted as R in organic solvent to perform addition reaction with HX to obtain the product as X-R-X, (2) substituting the obtained X-R-X in aqueous solution of sodium hydroxide to form OH-R-OH, and (3) carrying out alcohol dehydration reaction of Enol, polyethylene glycol and the obtained OH-R-OH to produce modified polyether. USE - The modified polyether is useful in polycarboxylic acid water reducing agent (claimed). ADVANTAGE - The modified polyether: is grafted with graphene, which improves the use effect of the polyether on the polycarboxylic acid water-reducing agent. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a modified polyether.