Polycarboxylate superplasticizer is a cement dispersant used in cement concrete. Polycarboxylate superplasticizer is a hydrophilic long side chain with a certain length and quantity and a highly polar active group with diversity. The special molecular structure surfactant composed of the main chain of the group has the characteristics of narrow molecular weight distribution, low impurity content and high polymerization activity, so as to meet the fluidity and retention time of the concrete construction. The structural diversity of polycarboxylate superplasticizers makes the development and development of such products more meaningful. The polyether type water reducing agent can be synthesized by using a polyether monomer, a plurality of functional groups to assist the main chain design, and a change in the production process to obtain a variety of excellent mother liquor products. The polycarboxylate water reducing agent product synthesis method mostly uses GPEG or TPEG polyether macromonomer and small monomers such as acrylic acid to carry out copolymerization reaction under the redox initiation of ascorbic acid-hydrogen peroxide, and the heating temperature is about 60 ° C or low temperature. The product can be serialized, including high water reducing agent, water-reducing and water reducing agent, water-reducing and protecting agent, and moisture-preserving agent to meet the concrete construction of different raw materials and seasonal conditions.