The　silver-coated　copper　powders　were　prepared　by　a　reduction　method,　using　glucose　as　the　reductant.　The　different　adding　processes　of　silver-ammonia　solution　varied　the　micro-morphology　and　appearance　color　of　the　powders.　The　coated　powders　were　characterized　by　SEM　and　EDS.　The　silver　contents　of　different　adding　processes　were　calculated　by　titration.　Thus　the　optimal　adding　process　was　determined.　Meanwhile,　the　silver　coating　deposit　process　was　analyzed　by　observation　of　the　powders　taken　out　from　the　solution　at　different　stages　during　silver　plating.