The construction of Hollow beams pre-tensioned is common in the construction of the bridge construction project, because it has a larger span, the characteristics of can be prefabricated, it has great promotional value. This article according to Beijing-Zhuhai Expressway Extension Project in the instance of bridge construction, respectively from the construction of steel strand, steel banding, formwork, concrete pouring, the conservation of plate girder, the measurements, the beam of slotting and stacking such nine aspects to Introduce the construction elements and key issues of the first prestressed concrete hollow beams (Group of tensioning and relax) , express their personal understanding and analysis of its.