Research conclusions:Through researching temperature control for the streammaintenance of32m boxgirder inwinter, the temperature control parameters for stream maintenance of concrete box girder in four stages in winter and the precasting technique of the girderare offered. The application shows all the indexes of the precasted concrete box girder meet requirements of"TechnicalSpecifications forConcrete PrecastedGirder forPassengerDedicated Line", the period ofprecasting the box girder is shortened and the precasting quality of the box girder is ensured. All of these create the foundation ofensuring the construction process.