Abstract: On the basis of previous studies,rules of decarbonizing and temperature increasing close to the end-point of blowing during converter steelmaking were studied.A reblowing model was established,and the linear regression self-adaptive algorithm was used to achieve dynamic correction of the model's parameters.The results show that there is a linear relationship between total oxygen efficiency of decarbonization and carbon content in liquid steel at reblowing stage,and with application of the model,the precision and hit rates of end-point control have been achieved to meet the need of automotive converter steelmaking.