Abstract: The characteristics of ring baffle plates and standard spray sieve plates pulsed columns are studied according to the 1A unit process of spent fuel reprocessing middle factory. A column with 120 mm diameter by 2 575 mm is used. Its cross section area is 25 %. The results from the operating characteristics experiments illustrate that the flooding rate of ring baffle plates column is 2.29 cm/s and the later is 1.60 cm/s, and the flooding can be rapidly handle in ring baffle plates column. The results from mass transfer experiments in uranium system illustrate that equivalent heights of both columns are 700 mm, the heights of mass transfer unit are 210 mm, extraction rates of uranium are 99.99 %, but the operating range of ring baffle plates column is wider. The results show that ring baffle plates column is better than standard spray sieve plates column.