Mixing abandoned tyre rubberized powder as filler into cement-soil to form rubberized cement-soil can improve physical mechanical properties of cement-soil. By the methods of natural immersion and chemical titration, the rubberized cement-soil resistance to chlorine-ion permeation was tested and measured. With rubber content increasing, the chlorine-ion content and the apparent diffusion coefficient gradually reduces. The effects of large rubber particle size are better than that of the small. The soluble chlorine-ion content decreases with the erosion depth increasing. In the same depth, as erosion solution concentration increases, the apparent diffusion coefficient increases manyfold. It deduces that rubberized cement-soil resistance to chlorine-ion permeation is superior to common cement-soil.