The　blocking　temperature　(T(B))　of　the　ferromagnetic　and　antiferromagnetic　mixed　films　has　been　studied　by　Monte　Carlo　method.　T(B)　is　found　in　the　simulation,　which　is　discussed　with　the　energy　of　system　and　the　spin　configuration.　The　calculated　results　indicate　that　T(B)　may　be　produced　in　the　antiferromagnetic　coupling　system　with　small　number　of　spins.　The　effect　of　little　external　field　and　the　value　of　x　on　T(B)　are　also　considered.　It　is　found　that　T(B)　increases　with　decreasing　little　external　field　and　the　value　of　x.