The　effect　of　the　composition　and　concentration　of　the　geopolymer　pore　solution　on　the　passivation　characteristics　was　investigated.　At　first,　the　passivation　experiments　of　reinforcement　in　five　solutions　with　different　compositions　and　concentrations　were　carried　out.　Then,　the　formation　mechanism　and　electrochemical　characteristics　of　the　passivation　film　in　different　solutions　were　compared　by　electrochemical　measurement.　Finally,　the　influence　of　the　composition　and　concentration　of　the　pore　solution　on　the　composition　and　thickness　of　the　passivation　film　was　discussed.　The　results　show　that　a　passivation　film　with　a　bilayer　structure　is　formed　in　all　solutions.　The　passivation　film　composition　in　solutions　with　the　same　composition　is　similar,　but　the　passivation　film　thickness　increases　as　the　OH-　concentration　increases.　The　results　also　show　that　the　charge　transfer　resistance　of　the　reinforcement　in　cement　is　significantly　higher　than　that　in　solutions　with　the　same　OHconcentration,　which　may　be　caused　by　the　adsorption　of　calcium　silicate　hydrate　gel　on　the　surface　of　the　reinforcement.