Abstract: Decomposition-integration strategies of multi-agent systems and autonomy of agents provide a design foundation for analyzing complex process control systems.Based on logic algebra,detailed semantic descriptions of controller agent units and their collaboration relationships in complex process control systems based on multi-agent are presented by using agent-oriented programming.Their applications in designing a pressure control system for recycled gas in main-pipe with complicated disturbances are introduced.System construction and running effect indicate that this method has versatility and operability in actual system analysis and implementation.