Abstract: A model was developed to predict the hot rolling parameters such as rolling force, torque and power etc. For various flow stress equations were coupled which take into account of chemical composition, temperature, strain, strain rate and austenite grain size, the model can automatically calculate the rolling parameters based on input process parameters and calculated strain, strain rate in every pass. According to the real measured data this model can adjust its output. Compared with the mill data of Panzhihua Iron and Steel Company, the model is in a good agreement with no more than 10 % deviation.