The　surface　tension　of　aliphatic　superplasticizer　solution　and　ζ-potential　of　cement　particles　in　Cement-Water-Superplasticizer　system　were　studied　in　comparison　with　naphthalene　based　superplasticizer.　The　adsorption　amount　of　two　types　of　superplasticizer　and　their　adsorptive　characteristics　on　cement　particles　were　measured　and　analyzed　according　to　the　molecular　weight　and　functional　groups.　A　multilayer　adsorption　phenomenon　was　concluded　when　superplasticizer　was　adsorbed　on　cement　particles.　Langmiur　single　layer　adsorption　may　occur　only　in　the　case　of　low　superplasticizer　concentration.