Treatment of printing and dyeing wastewater was studied in the experiment, and the basic principle of wastewater treatment by cold plasma technology was introduced, treatment effect of the cold plasma treatment technology for the wastewater was also studied. Through changing the electrode gap, pH, concentration and surface thickness, the process and mechanism of treating wastewater by the low temperature plasma were analyzed, and the best experimental conditions were obtained, which can provide a reliable basis for future engineering realization.% 对印染废水的处理进行了实验研究，阐述了低温等离子体技术处理废水的基本原理，研究了低温等离子体技术对废水的处理效果，通过改变电极间距、pH、浓度、液面厚度等实验因素分析了低温等离子体与废水的作用过程及其机理，并找出了最佳实验条件，为以后能在工程实现提供了可靠依据。
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