According to the result of Tuanhe river aqueduct prototype test,the paper studied strain construction technology of two-way prestressed of thin-wall concrete U-type structure across Tuanhe river. It also proposed the detail and operative construction technology of prestressed stretching; grouting and sealing anchor.Combining the data of safety monitoring of aqueduct,it evaluated the strain effect.The results showed that the construction process can meet the quality control requirements of aqueduct and has certain reference significance for the design and construction of similar prestressing aqueduct projects.