Abstract: The craft of single grade CuFC adsorption+microfiltration was used to treat the simulative wastewater containing ¹³⁷Cs. The affects of the initial activity concentration of ¹³⁷Cs, the adsorption time, pH, competing ions and the dosage of CuFC on decontamination fator(DF) were studied. The results indicate that when the adsorption time is 90 min, pH is 7, the dosage of CuFC is 80 mg/L, and add no competing ions, DF reach 2.06×10⁴, 1.62×10⁴ and 9.36×10¹ respectively for simulative wastewater made up of pure water (C₀=4.24×10⁵ Bq/L), surface water(C₀=2.84×10⁵ Bq/L ) and seawate(C₀=2.84×10⁵ Bq/L ). It indicates that the craft of CuFC adsorption microfiltration is a high-efficiency craft to treat wastewater containing ¹³⁷Cs, and has considerable application prospect.