Abstract: Addressing the issue of preparing steel company's integrated production plan of overall linkaging of such operation steps as steel-making,casting,rolling,heat treatment and processing,a linkaging production planning system with linkage of five major operation steps is set up,with which,the complex production planning issue is separated into three hierarchy and three sub-modules.The development and utilization of theproduction planning module for a production-sales integrated system as set up by a certain domestic steel tube-making company demonstrate that the said method is capable of managing the issue for steel tube makers to prepare their production plan related to linkage of multiple operation lines and production processes.