Abstract: Using the simulated groundwater as leaching liquid, the retention capability of U(Ⅵ) in solidification products with Portland cement, the Portland cement containing silica fume, the Portland cement containing metakaolin and the Portland cement containing fly ash was researched by leaching experiments at 25 ℃ for 42 d. The results indicate silica fume and metakaolin as blended materials can improve the U(Ⅵ) retention capability of Portland cement solidification product, but fly ash can not.