Water reducers have evolved from the early lignin sulfonates to the commonly used sodium salts of β-naphthalenesulfonic acid formaldehyde condensates (SNF) and sodium salts of sulfonated melamine formaldehyde condensates (SMF) in the market. Now, a new generation of highly efficient polycarboxylic acid polymer water reducers has been developed at home and abroad. It has the characteristics of low admixture, high water reduction, high reinforcement, low alkali, low shrinkage, high collapse retention, and green environmental protection, and is increasingly favored by the market. However, due to the characteristics of the process route, polycarboxylic acid water reducers have obvious disadvantages, that is, they are all supplied in 22% aqueous solution on the market, and the long-distance transportation cost is very high, and they cannot be supplied to fields such as dry mortar that require powder. There are two reasons: First, due to the polymerization process of polycarboxylic acid water reducers, it has a high water content, generally between 45% and 78%. It requires high energy consumption to make it into powder, and the expensive processing cost brings great difficulties to its deep processing.