This paper presents the design of the corrugated paper synchro cutting control system. This system consists of the DC moter speed control system and the micro-computer control system. The linear quadratic optimum regulator was adoped to design the DC motor speed contrd system. The double CPUs technique of single chip microcomputer was adoped to design the computer control system. So, it's a system of great power and high precision. Rapid response, high precision, high reliability and convenient operation are characteristic of the system.