Based on the project example, we obtain the parameters of large-scale geotextile bag filled with silt, give the relationship between the filling pressure stress and circumferential force between the bag bodies, and get the turnover rate of the filling bags of certain specifications. Based on the analysis of the foundation’s settlement displacement, we adjust the standard controlling the settlement displacement under the prerequisite of guaranteeing the stability of the foundation, and achieve the objective of improving the construction efficiency, shortening the construction period, and cutting down the construction cost.