Abstract: In order to solve the increasing pollution caused by dye wastewater in textile industry,a heterogeneous catalyst,viscose fiber-supported cobalt phthalocyanine(Co-TDTAPc-F),was prepared and the catalytic decolorization ability of this heterogeneous catalyst to different dyes was investigated by using UV-Vis spectrum.The results demonstrated that these dyes were enriched by Co-TDTAPc-F,whereas they were decolorized effectively in the system of Co-TDTAPc-F/H2O2and the color removal of each dye was more than 85% in 60 min.In addition,the decoloration of dyes was influenced by the number of sulfonic groups and the substantivity of dyes.