Abstract: The extraction behaviour of uranyl ion with twenty seven crown ethers in 1, 2-dichloroethane from mineral acid aqueous solutions are studied. The experimental results indicate that the distribution ratio of uranum(VI) are related with the kinds of crown ethers, anions and diluents. It is found that di-cyclohexyl crown ethers in 1,2-dichloroethane can provide the best extraction of uranium (VI) in hydrochloric acid.