The construction of Three Gorges Project (TGP) is characterized by large construction scale, high construction intensity and complexity in technology. In view of various technical difficulties such as navigation in construction period,Changjiang river closures, high intensity concrete and earth rock construction,roller compacted concrete (RCC) cofferdam in 3-stage III and double line five step ship lock,the general arrangement of the project construction is as follows:construction in 3-stage,navigation with diversion channel and power generation under cofferdam project.The practice and innovation achievements in river diversion during construction as well as earth rock and concrete construction were presented emphatically.