Recently,　the　catalysts　for　ammonia　synthesis　with　higher　stability,　higher　activity　and　lower　cost　have　received　considerable　attention.　This　paper　describes　the　new　finding　of　the　oxide-supported　ruthenium　catalysts　for　ammonia　synthesis　such　as　support　preparation,　catalyst　reduction　and　the　role　of　promoters.　Advances　in　alloy　catalysts　for　ammonia　synthesis　such　as　fuse　iron-cobalt　alloy,　bimetallic　nitride,　as　well　as　supported　bimetallic　are　reviewed　by　combining　the　results　of　theory　and　experiment.　The　problems　in　the　research　of　the　oxide-supported　catalysts　ruthenium　catalysts　and　alloy　catalysts　and　the　directions　of　the　future　research　are　also　proposed.