Abstract: From the perspective of precision design,a multi-objective programming mathematical model of BOF-caster matching for one production line in the steelmaking plant which produces plates and strips was proposed with production capacity,matching of rhythm time,and investment as the objective functions.Then,by using the same method and based on the mathematical model for one production line,a multi-objective programming mathematical model of BOF-caster matching for the multi production lines was established.The solving method of the model was given by an improved delaminating sequence method. Using JAVA language and through Eclipse software, the model was solved by the method of object-oriented programming. Finally, the model verified that the design scheme of Shougang Jingtang Iron and Steel Co. Ltd. was the better project.