Abstract: The water rapid drawdown to the dyke slope stability influence is the present Geotechnical hot issues,This article mainly introduces the unsaturated transfusion analysis method,considered that between the penetration coefficient as well as the degree of saturation and matric suction ’s misalignment relations,the analysis infiltrates the flow field-stress field coupling mechanism and the mutual influence relations,under uses infiltrates the flow field-stress field coupling finite element method t...