Abstract: The selection research of geochemical engineering barrier material for the buried disposal of very low level radioactive waste containing uranium was performed. The thermodynamics calculation results indicate that the overwhelming majority (more than 99%) of U(Ⅵ) in the groundwater exit as the complex species, such as UO₂(CO₃)^2-₂,UO₂(CO₃)^4-₃,UO₂CO⁰₃ and UO2(HPO4)^2-₂. Surface electric charge of the four samples was measured, and the result shows that the soil sample Ⅲ has the highest positive charge value among the investigated soil samples, and it is high K_d value. The experiment of additive selection was performed through measuring the sorption rate. There are eight additives and four kinds of basic material in our experiment. The results show that the most of investigated additives can not remarkably improve the adsorption performance of the soil for uranium, but the additive of charry gritstone and Ca(OH)₂ have great effect on the improving sorption rate. The effection of Ca(OH)₂ is better than charry gritstone.