Abstract: The construction of a flood control training field to provide a real drill ground for simulating flood control environment is the first at home and abroad. In order to support the design analysis of a seepage failure segment for the flood control training field of Jiangsu Province, based on the basic theory of soil seepage failure and taking into account the actual needs of the flood control training, the filling material of the embankment is determined firstly. The physical and mechanical property tests are conduted, and then the unsaturated seepage analysis parameters are estimated from the grading curves. Two different scale models for the seepage failure are established, and the model test results are compared with the numerical calculation results to verify the reliability of the numerical analysis. Finally, the seepage numerical analysis of the practice model is performed. According to the above experimental and numerical analysis results, the corresponding conclusions and recommendations are put forward for the design scheme. The suggested design scheme is based on the homogeneous soil, and its rationality remains to be further verified in the actual projects because the inhomogeneity of the actual filling material is larger.