The　development　of　a　modified　cement　stabilized　calcareous　sand　(MCSCS)　material　with　high　strength,　low　carbon　and　heavy　metal　ions　adsorption　capacities　is　crucial　for　the　eco-friendly　construction　of　islands　pavement　bases.　This　study　utilized　natural　zeolite　powder　(ZP)　and　three　supplementary　cementitious　materials　(SCMs)　to　develop　MCSCS.　The　macro　properties　and　micro　mechanisms　of　MCSCS　were　analyzed　using　various　experiments.　The　results　indicated　that　while　ZP　alone　reduced　the　mechanical　properties　of　MCSCS,　making　it　unsuitable　for　airport　pavement　bases,　combining　ZP　with　SCMs　significantly　improved　these　properties　due　to　the　synergistic　effects　of　the　pozzolanic　reaction,　achieving　strengths　up　to　5.31　MPa.　Microscopic　analysis　revealed　that　the　competitive　adsorption　of　Ca2+　by　ZP　resulted　in　a　looser　microstructure,　whereas　SCMs　promoted　the　formation　of　calcium　silicate　hydrate,　calcium　aluminate　silicate　hydrate　and　tobermorite,　leading　to　a　denser　microstructure.　The　cation-exchange　and　hydroxyl　group　binding　properties　of　ZP,　combined　with　the　physisorption　and　chemical　binding　of　the　hydration　products　from　SCMs,　significantly　enhanced　the　heavy　metal　ion　adsorption　of　MCSCS.　The　maximum　removal　rates　of　Pb2+,　Cu2+,　Cd2+　and　Zn2+　by　MCSCS　were　81.64　%,　76.26　%,　71.39　%　and　65.11　%,　respectively.