Abstract: This paper focuses on the practical background of LanZhou Steel Corporation's 70t UHP-DC-EAF's distributed process computer control system,sets up a simulation environment for its modeling and controlling,lays particular emphasis on the research of its process level control,and provides certain basis and practicability for some modern control strategies' application in practical production processes. This simulation environment not only has instructive value to UHP-DC-EAF's steelmaking process level control,but also has reference value to other intermittent processes' control.