The posibility has been shown by using PMBP resin for separation and determination of trace amounts of REE in the presence of a small quantity of benzoyl acetone. The REE can be eluted quantitatively by using O.1N hydro- chloric acid. The relative standard deviation (n=8) for two samples containing 0.171%，0.320%REE are 0.0062, 0.004 respectively.