A kind of radiation shield concrete used for the nuclear reactor engineering was prepared. With the viewpoint of technology and economy, following materials, such as three kinds of graded aggregates, 425 Portland blastfurnace cement, a radiation shield property additive and homemade crystal water additive were employed C30 concrete with apparent density of 3 600 kg/m3, crystal water content of up to 4% and good radiation shield property for gamma ray and neutron ray.