Abstract: The transfer behavior of Cr(Ⅲ) through the emulsion liquid membrane system of TBP-Span80-atoleine -kerosene was studied.The effects of membrane phase component, pH value in external phase, concentration of H₂SO₄ in internal phase，ratio of emulsion-water (R_ew)and coexisting ions on the transport rate of Cr(Ⅲ) were investigated.The results showed that the transport rate of Cr(Ⅲ)could reach 99.5% under the optimun conditions of 7%TBP, 5%Span80, 4% atoleine, 84%kerosene, 1.0 mol•L^-1 H₂SO₄ in internal phase and pH 3.5 in external phase.This method was applied to the treatment of Cr(Ⅲ) waste-water, and the residual concentration of Cr(Ⅲ) could be reduced to 1.0 mg•L^-1 ,which was below the national standard of waste-water discharge.