This article describes waste water treatment plant control system processes, system configuration and software design, and by the PLC and PC control system consisting of the main features are described. PC through configuration software design commitment to monitor and manage tasks, lower computer use PLC implemented real-time data acquisition and control functionality. The actual running achieved good control.%本文介绍了污水处理厂控制系统的工艺流程、系统配置和软件设计，并对由PLC和上位机组成的自动控制系统的主要功能进行了说明。上位机通过组态软件设计承担监控和管理任务，下位机采用PLC实现实时数据采集和自动控制功能。实际运行取得了良好的控制效果。
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