A review. Main cobalt-containing wastewater treatment processes currently used in China and abroad were introduced, which includes: hydroxide precipitation, sulfide precipitation, ferrite coprecipitation, adsorption, ion exchange resin, solvent extraction, membrane separation, and biol. process. The advantages and disadvantages of each process as well as their application situations were analyzed. It was pointed out that, combined process should be the research direction of cobalt-containing wastewater treatment in the future.