Abstract: By analyzing the system objects and using modeling and simulation technologies,the corresponding object models are established.A knowledge-based event scheduling simulation strategy is adopted,an integrated train dispatching model which includes materials,technics and transportation is established,and iron melt route choice and automatic collision avoidance algorithms for molten iron transportation in iron & steel plants are realized.The rationa-lity of iron melt distribution and railroad layout can be evaluated by the simulation system.The simulation results have been applied to practice with good economic benefit,and offers directions for related researches and automation in the industrial arts of railroads.