Abstract: Nowadays, the complex organization mode of multi-steel grade production exists in many steelmaking plants in China. The matching between metallurgical furnaces and casters has effect on the smooth running of production in the workshops. With a typical steel plant in China as an example, the issue about furnace-caster matching was analyzed based on previous studies. The concept of equivalent period was proposed to solve the furnace-caster matching mode in combination with product structure. The index of furnace-caster matching degree was suggested to evaluate the furnace-caster matching mode.