Abstract: The simplification of the stripping steps of TRPO process by using acetohydroximic acid is studied. Am(Ⅲ), RE(Ⅲ) and Pu(Ⅳ) loaded on 30% TRPO/kerosene can be stripped by 0.5 mol/L acetohydroximic acid, while U(Ⅵ) can not be stripped, thus U can be separated from Am and Pu. However, it is difficult to strip Fe(Ⅲ) from the loaded extractant, this will cause trouble to the U stripping with 50 g/L ammonium carbonate or sodium carbonate. Therefore, to use acetohydroximic acid in simplification of TRPO process, the problem of stripping of Fe must be solved.