Soils　are　actually　unsaturated　in　nature.　In　the　present　study,　a　stability　analysis　of　a　geosynthetic-reinforced　slope　in　unsaturated　soils　subjected　to　various　steady　flow　conditions　is　conducted　based　on　limit　analysis.　Work　rate　by　apparent　cohesion　due　to　matric　suction　is　calculated　based　on　the　effective　stress-based　equation.　Analytical　expression　of　the　required　cohesion/stability　number　of　slope　is　derived　from　the　energy　balance　equation.　An　optimization　code　is　programmed　to　capture　the　optimized　solution　of　the　stability　number.　Comparison　is　made　to　verify　the　present　work　and　a　parametric　analysis　is　conducted　to　investigate　the　effects　of　soil　type,　infilitration　rate,　reinforcement　strength　and　soil　suction　on　slope　stability　afterwards.　A　set　of　numerical　solutions　is　presented　at　the　end　of　the　paper　for　preliminary　design　purposes.