Research conclusions: For the prestressed cable anchor tied pile-slab wall on embankment's shoulder or slope，the distribution and size of the earth pressure become more complicated for the action of the anchor prestress. The earth pressure acted on the pile and slab can be cut into two parts: one for the total earth pressure of strip limit equilibrium and the other for the total earth pressure of active Coulomb when the influence of the anchor prestress is not considered. Secondly the enlarged earth pressure caused by the anchor prestress. In design of this type of retaining structure，the earth pressure acted on the pile and slab are the same in quantity ，and can not be considered the decreasing effect for the pressure caused by the”soil-arching effect" ; The calculation of the moments in the pile of this type of structure must consider the influence of the distribution and size caused by the anchor prestress; The earth pressure caused by the wall top ground rectangular traffic loads can be gained from the elastic theory.