本文研究了亚铁盐与ＰＡＭ复合絮凝剂处理电镀废水中Ｃ６＋ｒ的絮凝效果、性能和机理，测定了最佳ＰＨ值、最佳投药量、最佳水力条件以及絮凝过程中Ｃ６＋ｒ的浓度变化、水纤密度变化和电导率变化等，并用显微摄影拍摄了絮凝过程不同阶段的矾花大小。为管道絮凝器用于处理电镀废水的设计研制提供理论依据。 In this paper, the flocculation effect, performance and mechanism of ferrous salt and PAM complex flocculant in the treatment of electroplating wastewater were studied. The optimum pH value, the optimal dosage, the optimum hydraulic conditions and the concentration of C6 + r in the flocculation process were determined. Fiber density changes and conductivity changes, and the use of photomicrographs flocculation process of different stages of alum size. It provides a theoretical basis for the design and development of the pipeline flocculant for the treatment of electroplating wastewater.