Abstract: Prestressed tension is a key link in the construction process of prestressed double-layer lining of water conveyance shield tunnels, precise prestressed tension control is very important for the overall service life of the structure.Based on a shield tunnel in the Pearl River Delta water resources allocation project, the tension construction technology of prestressed double-layer lining was summarized.The finite element numerical simulation was used to verify the stress control.In view of the defects of the existing measured data, a method for calculating the elongation of tensioned steel strand was proposed.The results showed that the intelligent tensioning construction technology had the characteristics of high precision and high stability.After the tension, the whole ring of the prestressed concrete lining structure was compressed, and the anchorage groove was the most unfavorable position of the whole ring.The maximum circumferential compressive stress was 14.0 MPa, which did not exceed the allowable stress of concrete, and the whole structure was safe.The error between the actual calculated elongation of the ring anchor steel strand and the allowable value of the specification did not exceed 6%,which met the engineering requirements.The research results enrich the prestressed tension and control technology system.