The　chemical　structures　of　four　types　of　superplasticizers　(SPs)　and　their　adsorptive　behaviors　on　beta-C2S　were　investigated.　The　adsorption　properties　of　SPs　on　beta-C2S　were　measured　and　the　relationship　between　the　adsorption　quantity　and　the　specific　surface　of　beta-C2S　was　analyzed.　The　experimental　results　show　that　the　adsorption　quantity　increases　with　the　surface　area　increase　of　beta-C2S,　but　the　adsorption　quantity　per　surface　area　is　similar,　which　means　that　the　main　adsorbent　is　beta-C2S　itself.　Polycarboxylic　ester　(PCE)　showed　the　highest　adsorption　amount　on　beta-C2S　followed　by　beta-naphthalene　sulfonates　(NSF)　and　formaldehyde-acetone　condensates　sulfonates　(FAS),　amino　sulphonate　(AS)　showed　the　least　adsorption　amount　on　beta-C2S.　PCE　affected　the　surface　potential　of　beta-C2S　particles　in　water　differently　in　comparison　with　other　types　of　SPs.　The　adsorption　capacity　of　SPs　on　beta-C2S　is　determined　by　factors　such　as　molecular　structure,　functional　groups　and　molecular　weight　of　SPs.