PLC控制系统的抗干扰能力是关系到整个系统可靠运行的关键。要提高PLC控制系统可靠性，一方面要求PLC生产厂家用提高设备的抗干扰能力；另一方面，要求工程设计、安装施工和使用维护中引起高度重视，多方配合才能完善解决问题，有效地增强系统的抗干扰性能。 -PLC control system anti-interference ability are related to the whole system the key to reliable operation. PLC control system to improve reliability, on the one hand, require PLC manufacturers improve equipment with anti-jamming capability　On the other hand, engineering design, installation and use of maintenance pay great attention to collaborative efforts on various fronts in order to improve problem-solving and effectively enhance the system anti-interference performance.