The numerical simulation and application experiment are used to research the electromagnetic stirring (EMS) in Angang steel company limited. The results show that the stirring effect in side to side position of EMS rolls is better than that in face to face position. And the stirring effect in triples zero patterns are better than that in the double butterfly patterns. The application effect of EMS in Ansteel is obvious. The equiaxed zone in different steel grade such as low carbon aluminum killed steel, pipe steel, silicon steel and high carbon steel is improved 12-25% with EMS. And the slab center segregation has an obvious decreased after using EMS.