Abstract: After earthquakes, most of gravity retaining walls in the earthquake zone emerge an instability phenomenon, and due to the change of the retaining wall working conditions, instable accidents might be produced. Thusly, the framework anchor with flexible prestress was used to reinforce gravity retaining walls. On the basis of limit equilibrium theory, the overall static stability of gravity retaining wall after flexible reinforcement was analyzed, and the solution formula for the safe stability coefficient of anti-slip and anti-overturning was derived. The dynamic formula of stability was also derived by energy analysis and limit equilibrium theory. Based on the comparative analysis of numerical examples, the result showed that: the safe stability coefficient of reinforced gravity retaining walls was significantly improved, and the aseismic capacity of space synergy among soil, framework, anchor, and retaining walls was also improved respectively.