Abstract: The design method of monolithic processor emulating control system for liquid met al forging technology is introduced in this paper.It includes the establishment of liquid met al forging technological chart and logical variables,the design of hardware system,the building-up of MDS diagram and the actualization of software.For the logiscal control of technological equipment,the designed controller by use of the control structure of MDS diagram can easily actualize the control functions of PLC,and easily actualize the control functions of the other digital logical systems.