The benefit of adding water reducing agent to putty powder is that it can be modified and toughened to improve the performance of putty. Water reducing agent is a kind of concrete admixture that can reduce the amount of water used in mixing under the condition of maintaining the slump of concrete basically unchanged. Most of them belong to anionic surfactants, with lignosulfonate, naphthalene sulfonate formaldehyde polymers and so on. After joining the concrete mixture has a dispersing effect on the cement particles, can improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture, or reduce the unit of cement dosage, saving cement. According to the water reducing and enhancing ability of water reducing agent, it is divided into ordinary water reducing agent, high efficiency water reducing agent and high performance water reducing agent.