The　ruthenium　catalysts　for　ammonia　synthesis　have　higher　activity　than　the　iron　catalyst,　especially　under　the　condition　of　low　temperature　and　pressure.　Different　preparation　methods　and　preparation　conditions　will　influence　the　ruthenium　catalyst　activity　with　different　support　materials.　This　paper　describes　the　preparation　methods　of　Ru　catalysts　for　ammonia　synthesis　from　three　aspects,　including　the　pretreatment　of　supports,　the　loading　of　Ru　and　the　addition　of　promoters.　Different　methods　such　as　melting　method,　sublimation　method,　ion　exchange,　ultrasound　method,　precipitation,　sol-gel　method　,　impregnate　method　,　microwave-assisted　method　are　reviewed　and　the　shortages　of　some　methods　are　discussed.　The　development　trends　of　the　preparation　of　Ru　catalyst　are　also　proposed.