According to the control requirements, the control system of the rotary paper angle bead machine was designed. A new type of control system of rotary paper angle bead machine was put forward. In this system, one servo motor drove the eccentric wheel, making the cutter finish synchronous tracking in one circular motion and cutting the paper angle bead. The embedded controller with ARM9 S3C2416 as the industrial touching screen for CPU and integration of input and output (I/O port) achieved the highly precise control of cutting of paper angle bead with fixed-length. The software consisted of a touching screen for man-machine interface and a underlying driver, which could implement setting of product parameters, monitoring of operating state and alarm display of other servo motors, etc. The control system based on ARM was designed which met the control requirement and achieved fix-length cutting of paper angle bead at different feed rates and of different thicknesses. The practical application proved that the control system was of high automaticity, good human-machine interaction and high reliability. It can be widely applied to a variety of products.