Abstract: During the purification of wet-process phosphoric acid (WPA ) by solvent extraction，the colored organic impurities in WPA would react with the solvent and interfere the extraction process.Thus，it is necessary to remove the colored organic impurities in advance.In this paper，four kinds of activated carbon have been examined，and after intermittent experiments it is found that one of the four activated carbons has better decolorizing performance and the lowest loss of phosphorus.Continuous experiments with glass adsorbing columns have also been conducted.The initial decolorizing rate，optimum dosage，primary regeneration rate，secondary regeneration rate and maximum decolorizing rate of this kind of activated carbon have been determined.The experimental results showed that： the optimum dosage of new activated carbon is 12.9 g(1 kg WPA)and its decoloration rate is 72%；the primary regeneration rate is 99.5% and the decoloration rate of regenerated activated carbon reaches 95% of new activated carbon.The granular activated carbons provided with large specific surface area，pore volume and average pore size are the most suitable products for WPA decoloration.