Abstract: The distribution ratios of fission products, such a s Zr, Mo, Cs etc. are measured based on the single stage extraction experiments of simulated highlevel liquid waste with 22%DHDECMP42%TBP/OK. The extraction b ehavior of the fission products in simulated highlevel liquid waste is determi ned on miniature countercurrent centrifugal contactor cascade (6 stages for extr action, 2 stages for scrubbing, 6 stages for stripping, AF∶AX∶AS=1∶1.5∶0.5 ;BF∶BX=1∶1). The experimental results show that in 1A extraction section, th e recovery of RE's (except for Y) is greater than 99.9%, while Rb, Cs, Sr and Ba are nearly not extracted, the decontamination factor (DF) for Zr, Mo is 3.2, 18, respectively and is more than 3×102 for Ru and In.