Water reducing agent is one of the most important types of concrete admixtures. It can be used alone or as a compound admixture with other functional components. It is a high performance water reducer for improving many properties of fresh and hardened concrete. The high performance water reducing agent is a water reducing agent having a higher water reducing rate, a better slump retention performance, a smaller drying shrinkage, and a certain air entraining performance than the superplasticizer. High performance water reducing agent has obvious technical advantages and high cost performance compared with other water reducing agents when formulating high strength concrete and high durability concrete.