Abstract: With the multi-dimension mass flow controlling theory of metallurgy manufacture procedure, this paper has analyzed the parameters for ironmaking/steelmaking interface, such as plant spatial configuration, time factor, conveyance quantity and temperature of hot metal, and introduced the concept of quantity to mass flow controlling procedure. These analysis data are the basis of the integrated optimum of blast furnace-pretreatment-converter manufacturing procedure. The conclusion is that the joining and matching procedure is key to produce stability, and the joining shortcoming of manufacture procedure at BaoSteel is pointed out.