Based on the laboratory model test, the deformation of pile-supported embankment and the stress distribution of soil filling under the action of geogrid are studied. The effects of geogrid tensile strength and the number of layers of geogrid on the vertical displacement of soft soil, vertical stress distribution of soil filling and pile-soil stress ratio are emphatically studied.The results show that the vertical displacement of soft soil decreases with the increase of geogrid tensile strength and the number of geogrid layers.Under the action of different layers of geogrid, the vertical stress of fill soil varies greatly with the height of fill soil.Considering the soft soil deformation of pile-supported embankment and the transfer degree of filling load to the pile top comprehensively, the effect of geogrid under the study condition is understood, which can provide a basis for selecting suitable geogrid tensile strength and layers in embankment engineering.