Abstract: Taking a engineering of Guangzhou metro for example,in which using penetrative grouting with MC-S material to consolidate saturated sand,through the simulative experiment indoor and experiment in situ,discussing the penetrative theory of using MC-S material to consolidate saturated sand,putting forward some conclusions,such as the relationship among the spread radius of liquor,the pressure of underground water and the physical and mechanical indexes of sand,the relationship among the grouting pressure,the penetrative rate of even medium and grouting time,and the coupling relationship of the grouting pressure field and the ground stress field.