Abstract: Time has a decisive influence on the coordinated operation among each processes in the manufacturing process. To achieve the dynamic and orderly operation of the manufacturing process, the coordination of each process in terms of time factors is very importance. The theoretical basis and methods of process optimization were introduced. Focusing on the thin plate steel-making system of Masteel, through events and time analysis, the key factors affecting time were proposed, such as casting speed and empty ladle operation time. Based on this, the primary measures to improve the operational efficiency of the steelmaking system were proposed, such as shortening the oxygen supply time and tapping time of the converter, reducing the use frequency of the LF（label furnace）, increasing the casting speed and continuous casting times of CC（continuous casting）, and reducing the running time of empty ladles and the transportation time of heavy ladles. Through the process path, process technology and interface technology research, the processing time and waiting time of each process had been shortened, and the operation of the process had been optimized. The dynamic-orderly, collaborative-continuous operation of the process has been basically achieved, significantly improving the production efficiency of the process. The converter operation cycle, CC pouring cycle, and empty ladle operation time are reduced by 6 min, 3.3-9.6 min, and 23-40 min, respectively. The number of online ladles decrease from 17 to 14. The crude steel output has increased from 7.44 Mt/a to 9.73 Mt/a, approximately 30% has been increased.