The　development　of　the　city　traffic　and　its　increasing　traffic　flux　are　the　signs　of　the　development　of　the　society,　but　causing　a　serious　pollution　on　the　city＇s　ecological　environment.　Cement　hydration　reactions　are　needed　to　generate　Ca(OH)2,　C-S-H　gel,　and　AFt,　as　well　as　other　hydrated　products.　Meanwhile,　heavy　metal　ions　are　contained　and　fixed　in　a　cement　paste　under　physical　encapsulation,　absorption,　isomorphous　replacement,　and　double　decomposition.　This　paper　mainly　discusses　the　impact　of　hydration　environment　on　the　adsorption　law　of　materials　adsorbing　heavy　metal　ions　and　the　adsorption　mechanism　under　different　pH　values　and　temperatures,　analyzing　specific　reasons　from　the　perspective　of　micro-structure.　Through　the　analysis　it　can　be　seen　that,　in　addition　to　zinc　ions,　the　cement-based　materials’　capacity　of　adsorbing　heavy　metal　ions　increases　as　the　pH　value　and　the　temperature　increase.　Micro-structure　analysis　shows　that　cement-based　materials’　main　adsorption　methods　are　different　when　pH　values　are　different.　©　2016　Trans　Tech　Publications,　Switzerland.