>Abstract The paper introduces a distributed control system based on CC-Link fieldbus in the BOPP film product line. Mitsubishi Q02CPU PLC is used in the system and 590 series controller is used as its DC driver. Several measured signals are transmitted to PLC via CC-Link and distributed I/O modules such as AJ65SBTB1-16D, FX2N-32CCL, etc. In this paper the process of BOPP film production and the characteristic of CC-Link are introduced. Because the product line is continued working, its devices are spread around 80 meters, and its controlled process is complex. For above reasons, the distributed control system is consisted of 4 subsystems with relative independent function. Viz. the speed chain drive control system, the temperature control system, the film thick measured system and the auxiliary control system. The actual application shows that the distributed control system is simple, reliable and good real-time. There is a powerful demonstration for the its further application. KEY WORDS fieldbus; CC-Link; distributed control; BOPP; PLC; IPC; single-chip microcomputer