As the specific temporary buildings in water conservancy and hydropower projects，the construction diversion structures undertake great roles of completing flow discharge and ensuring normal construction.It's design quality directly affects the project implementation，engineering cost，project progress，etc.The diversion building and its diversion time in Wuxikou hydraulic project has been optimized and put into practice，and has achieved good technical and economic benefits，which can provide reference for the construction of similar water conservancy projects.