Abstract: An integrated operation planning optimization model for special furnace charge mode, which is a puzzle of integrated planning in iron and steel enterprises, was introduced. The model was solved by a multistep optimization method based on combining optimization and simple simulation. With given process parameters for simulation, an optimized and integrated operation planning and the operating time for hot and cold slabs can be presented rapidly by the optimization method. The result optimized by the model meets the actual demand, and the operation planning is feasible and operable.