The　influence　of　saturation　degree　on　the　carbonation　resistance　of　alkali-activated　slag　mortar（ASm）with　water　glass　as　activator　was　studied　by　X-ray　diffraction，thermogravimetric　analysis，nuclear　magnetic　resonance，and　mercury　intrusion　porosimetry.　The　results　show　that　with　the　decreases　of　saturation　degree，the　decalcification　of　calcium　alumino　silicate　hydrate（C（-　A）-S-H）gel　becomes　more　severe，the　total　porosity　and　the　most　probable　pore　size　of　ASm　increase.　The　unstable　aragonite　and　vaterite　generated　by　carbonation　increase　with　the　decreases　of　the　saturation　degree，resulting　in　the　deterioration　of　the　carbonation　resistance　of　ASm.　With　the　decreases　of　saturation　degree，the　reduction　in　compressive　strength　retention　rate　and　the　increase　in　carbonation　depth　of　ASm　are　decreased.　©　2024　Tongji　University.　All　rights　reserved.