Abstract: As one of the “three interfaces” in steel manufacturing process，the connection and matching of process equipment and production rhythm in steelmaking-CC section play a decisive role in the smooth operation of the whole production process.The ladle turnover at the steelmaking-continuous casting interface of Shougang Jingtang Steel Rolling Department was analyzesed. Under the guidance of queuing theory, the ladle turnover from converter tapping to molten steel casting was optimized.After optimization, the ladle running time is shortened from 85 min to 81.3 min, and the ladle turnover times is increased from 3 times to 4.5 times.The ladle turnover rate is more than 85 %，which provides a theoretical support for the management. 

Key words: steelmaking-CC section, interface, queuing theory, ladle turnover