With the development of urbanization and highway construction, the construction of major cities in the metro and underground tunnels, cross-river tunnels, highways, mountain tunnel. In these underground works shield, the shield tunnel wall are related to the post-grouting and earth pressure balance shield construction. Both works involve grouting materials, HEC is the grouting material insurance agent, can increase the grouting material workability, pumping, to improve the strength of concrete is also of great benefit.