Non safety minimum Digital I&C system as a multifunctional platform has broad application pros-pects. This article describes the research and development process DCS minimal system,analyzes and discusses the minimum DCS system design, system architecture, functional requirements. The application of minimum Digital I&C system are summarized. The system has been tested and the results show that the system meets its goals to meet the needs of nuclear power plants.%非安全级DCS最小系统作为一种多功能平台具有广泛的应用前景。对DCS最小系统的研究与开发过程进行阐述，对最小DCS系统的功能需求、设计思路、系统结构等进行分析和探讨，并对DCS最小系统的应用效果进行了总结。经测试与应用证明，所设计系统达到预期目标，较好满足了核电厂的生产需求。
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