Research conclusions: The method put forward in this paper is simple and practical. It carp Le used for calculating the active breaking angle and the total active earth pressure on the embankment pile-slab wall with the geo-grids. For a high pile-slab wall，the earth pressure can be decreased by means of each layer of the fillings paved with each layer of geo-grids，then the pile section size and the slab thickness can he decreased. But the fillings shall be hard such as rock with less weathering; the geo-grids shall be positioned at the middle-upper below the fillings, the more details must be determined according to its stretching strength and the friction resistance provided by the earth fillings within the breaking surface. Finally it is suggested chat a further research must he performed of their arrangement, layer-distance and deformation characteristics etc.，to make the theory more conforming to match the practice