A　research　is　made　of　the　limit　analysis　of　stability　calculation　of　reinforced　embankment　to　perfect　the　design　method　of　limit　analysis　of　reinforced　embankment.　Based　on　limit　analysis　plasticity　theory　and　traditional　slice　method,　a　formula　was　built　to　calculate　the　safety　factors　about　stability　of　the　reinforced　embankment.　Then　this　formula,　Dutch　method,　Sweden　method　and　the　method　of　Chinese　designing　standard　of　reinforced　embankment　were　introduced　separately　to　explore　the　influence　of　the　factors　such　as　unit　weight,　cohesion,　internal　friction　angle,　geosynthetics　tensile　strength　and　the　height　of　embankment　on　reinforced　embankment　stability.　The　calculated　results　of　the　formula　of　this　paper　are　close　to　those　of　Dutch　method　and　Sweden　method.　So,　the　formula　of　this　paper　can　be　reasonably　regarded　as　a　method　to　evaluate　stability　of　reinforced　embankment　and　the　conclusions　can　provide　the　reference　for　the　design　of　reinforced　embankment.