Abstract: Cerium（Ce）supported activated carbon（AC）was made by dipping method to increase the processing efficiency for the simulated dyeing-printing wastewater，which was prepared by KN-R as model contamination. The standard curve of dyeing-printing simulation wastewater was created to calculate the mass concentration of KN-R according to the absorbency，and it could be used as the measurement index of degradation effect. The effects of the loading amounts，adsorption time，initial concentration of KN-R，pH value on degradation were examined. According to the experimental results，it can be concluded as follows：the longer the adsorption time was，the better degradation effect would be；the cerium supported activated carbon was more suitable to treat the dyeing-printing simulation wastewater within a low certain range；the degradation effect of KN-R was better when the pH value was 5；the optimum loading ratio of cerium was 8wt%. AC and Ce supported AC at optimum loading ratio were characterized by XRF and XRD，respectively. It was found that Ce was loaded on the surface of AC and distributed evenly in the form of cubic crystal.

Key words: dyeing-printing wastewater, rare-earth metal, load, activated carbon, Ce