Polycarboxylate　superplasticizer　(PCE)　is　widely　used　in　concrete,　but　the　clay　content　in　the　aggregate　is　increasing　at　present,　which　seriously　weakens　the　dispersing　function　of　PCE.　Therefore,　in　order　to　lower　the　sensitivity　of　PCE　to　the　clay,　beta-cyclodextrin　(beta-CD)　was　used　for　synthesizing　anti-clay　polycarboxylate　superplasticizers　(AC-PCE).　Firstly,　the　clay　tolerance　property　of　AC-PCE　was　explored　by　the　fluidity　and　rheological　test;　then,　the　PCE　was　mixed　with　montmorillonite　(MMT),　and　interaction　mechanism　was　studied.　The　results　showed　that　compared　with　the　conventional　polycarboxylate　superplasticizer　(CO-PCE),　an　increase　of　19.5%　and　14.9%　was　observed　in　the　fluidity　of　cement　paste　and　mortar　for　AC-PCE,　indicating　that　the　sensitivity　of　AC-PCE　to　the　clay　was　lower　than　that　of　CO-PCE.　Both　CO-PCE　and　AC-PCE　were　adsorpted　on　MMT.　XRD　results　showed　that　intercalation　adsorption　had　occurred　for　both　CO-PCE　and　AC-PCE.　N-2　adsorption　results　showed　that　although　AC-PCE　was　also　inserted　into　the　interlayer　of　MMT,　its　adsorption　amount　was　lower　than　that　of　CO-PCE　due　to　steric　hindrance　from　beta-CD,　which　increased　the　sorption　level　of　the　AC-PCE　on　the　cement　clinkers　particles.　Therefore,　the　clay　tolerance　of　PCE　was　enhanced　significantly　by　beta-CD.