To study the influence law of gravel Geogrid’s effects on the stiffness of grave cushion, cushions of nine different kinds are designed and are carried out static load tests of models respectively. The effects of different thickness of cushion layer, with or without geogrid, the different geogrid layers and different laying position on gravel cushion and reinforced grave cushion deformation are analyzed. The test results indicate that: the decrease of the thickness of cushion layer can effectively reduce foundation settlement; within a certain range of load, the bearing capacity of gravel cushion with geogrids is better than that without geogrid; under the same load, when the thickness of cushion is same, geogrid layers and laying position is different, the gravel cushion stiffness is also different, and there is a best laid layers and laying position. The best geogrid layers and the best laying position need further study.