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After analyzing the architecture and characteristics of control system in process industry, the multi-agent technology was introduced into process industry process control, and a hierarchical distributed multi-agent control system was proposed. This system was composed of field monitoring agent, workshop coordination control agent and system scheduling management agent. And a hierarchical black-board model was taken as the communication mechanism of the multi-agent system. System management mode, the basic structure and main function of individual agent were designed. Detail system cooperation mechanism and a two-level coordination control strategy were also analyzed.