The Tuanhe Aqueduct project of the first phase of the Middle Route of the South-to-North Water Transfer Project has a novel structure, complex force, and the structure size ranks first among similar projects in China. It is an independent 3-channel fully prestressed concrete U-shaped thin-wall structure with a single span length of 40m and a single span weight of about 1600 t. Through the research on the prestressed construction technology of super-large cast-in-place U-shaped aqueduct, the mechanized construction of Tuanhe aqueduct body is realized, the project period is greatly shortened, and the construction cost and investment are saved.