In　this　research,　the　micro-morphologies,　electrochemical　behaviors　and　battery　discharge　performances　of　the　Mg-2Zn-xCa　alloys　as　potential　anode　materials　were　investigated.　The　micro-morphology　results　showed　that　for　the　alloy　with　low　Ca　content　(x　=　0.1　and　0.2),　only　the　Ca2Mg6Zn3　phase　was　observed　to　precipitate　in　a　punctate　form　within　the　crystal.　As　the　Ca　content　rose,　the　amount　of　the　punctate　Ca2Mg6Zn3　increased　while　the　strip-shaped　Ca2Mg6Zn3　phase　precipitated　at　the　grain　boundary　was　also　observed.　When　the　Ca　content　reached　0.5　wt%　and　higher,　the　second　phases　were　observed　to　be　both　Mg2Ca　and　Ca2Mg6Zn3　phase　which　precipitated　at　the　grain　boundary　and　the　morphology　of　second　phases　gradually　changes　into　a　con-tinuous　network.　Among　the　four　tested　alloys,　the　Mg-2Zn-0.2Ca　sample　delivered　the　best　electrochemical　activity　with　more　negative　corrosion　potential　and　larger　corrosion　resistance　in　electrochemical　experiments.　Battery　performance　tests　showed　that　the　Mg-2Zn-0.2Ca　anode　exhibited　an　improved　specific　capacity　of　1344.1　mAh　g(-1)　and　high　anodic　efficiency　of　61.0%　at　10　mA　cm(-2).　The　discharge　order　of　the　precipitated　phase　has　been　derived　as　follows:　Mg2Ca　＞　Mg　＞　Ca2Mg(6)Zn(3).