In　this　paper,　a　novel　reliability　analysis　algorithm　of　distribution　system　which　integrated　the　Wind　Power　Generators　(WPGs)　is　analyzed　based　on　Monte　Carlo　Simulation　(MCS)　method　and　Power　Circle　Strategy　(PCS)　island　operation.　First　of　all,　the　employed　theories　including　the　relationships　between　wind　speed　and　output　power　of　WPG,　the　basic　principle　of　MCS　as　well　as　the　concept　of　PCS,　are　described　in　detail.　Then,　the　structure　and　process　of　proposed　algorithm　is　introduced.　The　simulation　results　indicated　that　the　combination　of　WPG　and　PCS　can　not　only　improve　the　reliability　of　distribution　system,　but　also　give　the　priority　to　the　important　load　in　island　operating　conditions.