Abstract: The traditional oxidation distillation process for ruthenium recovery from ruthenium liquid waste was optimized because the loss rate of ruthenium is high,and the distillation residue was treated by extraction.The effects of distillation temperature,oxidant dosage,absorbent and pre-oxidation and extraction agent volume fraction,O/A and reverse extraction conditions on ruthenium recovery were discussed.The results show that with KMnO4-H2SO4 as oxidant and 6 mol/L HCl as absorbent,the ruthenium yield reached 89.0 % at the distillation temperature of 80 ℃ for 1 h.With the distillation residue regenerated,the reverse extraction rate reaches 80.4 % when the volume fraction of extractant N503 is 30 %,the O/A is 1,the reverse extraction agent is 2 mol/L NaOH,and the reverse O/A is 1.The total recovery of ruthenium recovered by the joint distillation and extraction method was 96.9 %,which was 7.9 percentage points higher than that of the single distillation method,thus effectively improving the regeneration utilization rate of ruthenium.