The effect of degree of crosslinking and amount of diluent on the adsorption equilibrium, rate and mechanism adsorption of uranium for MR type RGP resins were investigated. The adsorption equilibrium and rate of uranium on RGP resins were effected by degree of crosslinking and amount of diluent. The order of recovey of uranium with RGP resin is as follows; RGP-10(50) > RGP-1(50) > RGP-2(50) > RGP-5(50) > RGP-0(50). As the adsorption equilibrium of RGP were correlated with Freundlich and Langmuir isotherm and the mechanism of adsorption of uranium on RGP type resin were elucidated as intraparticle diffusion controlling and effective pore and, surface diffusivities were 0.158∼6.367 × 10^(-5)㎠/sec and 0.119∼27.63 × 10^(-10)㎠/sec respectitvely.