重点介绍了宝钢集团公司在苏通大桥斜拉索用高强度镀锌钢丝的研制实践中，通过制造技术研究和技术创新，形成了“双张紧 + 限径模”工艺、“主导工艺 + 微调”整体优化、“三度控制”热镀锌操作等三大关键技术，生产制造出了高强度、低松弛、具有良好扭转性能的国产桥梁斜拉索用高强度（1 770 MPa 级）镀锌钢丝。

This paper focuses on introducing the manufacture technique of the 1 770 MPa galvanized steel wire for stay cable usde in domestic bridges. During the development practices of high strength galvanized wire for the stay cable of Sutong Bridge, Baosteel Group established three key tecchnologies based on the research of manufacture technique and technological innovation. The three key technologies based on the research are: "Double tension + limiter die" process technology, "primary process + fine tuning" initegrated optimization technology and "three-level control" hot galvanization operation technology. With these key technologies, Baosteel Group produced the 1 770 MPa galvanized wire used for stay cable, which has high strength, low relaxation and good torsion performances.