The paper introduces major prestressed concrete box girder prefabrication process of 30 m-span bridge hole,discusses the beam field building,gantry crane type selection,common steel and prestressed steel strand fabrication and post tension prestressed construction and so on, and puts forward its construction methods and technology support,which has significant meaning for guaranteeing box girder prefabrication quali-ty,reducing cost and improving efficiency.%介绍了桥孔跨径为30 m 的标准预应力混凝土箱梁预制的主要过程，从梁场建设，门吊选型，普通钢筋和预应力钢绞线制安，后张法施加预应力施工等方面进行了详细论述，提供了此类箱梁的施工方法和技术支持，对保障箱梁预制质量、降低成本、提高效率具有重要意义。
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