Abstract: In the present paper, the synergistic extraction characteristics of 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl)pyridine(C2-BTP) and diglycolamides(DGA) in 1,2-dichloroethane, for the separation of Am(Ⅲ) and Eu(Ⅲ) from nitric acid media were studied. The results indicate that DGA with long alkyl chains increases the ability of synergistic extraction with C2-BTP. The distribution ratio(D) values with mixed extractants are more than twice that with C2-BTP alone, when the molar ratio of C2-BTP to C6-DGA is 3∶1 in 1.0 mol/L HNO₃ and 1.0 mol/L NaNO₃. The highest separation factor(SF) value of Am(Ⅲ) over Eu(Ⅲ) is around 21 under given conditions. Slope analyses indicate that the average coordination numbers of Am(Ⅲ) as well as Eu(Ⅲ) extracted with DGA alone are determined to be around 1.5, indicating that the donor oxygen of diglycolamide probably interacts with the polar halogenated diluents, which affects the complexing ability for Am(Ⅲ) and Eu(Ⅲ).