In　this　study,　phosphate-based　polycarboxylate　superplasticizer　(PPS)　was　successfully　prepared　via　precise　design　and　control　over　the　molecular　structure.　Macromolecules　with　pendant　chlorine　groups　are　synthesized　via　free　radical　polymerization　(FRP)　and　atom　transfer　radical　polymerization　(ATRP)　of　2-hydroxyethyl　acrylate,　vinylbenzyl　chloride　and　isoamyl　alcohol　polyoxyethylene　ether　in　the　presence　of　initiator,　chain　transfer　agent　and　metal　complex.　The　subsequent　Arbuzov　reaction　(AR)　between　trimethoxyphos-phine　and　chlorine　groups　of　macromolecules　gave　rise　to　new　type　of　PPS.　The　molecular　structure　of　PPS　is　determined　by　Fourier　Transform　Infrared　Spectroscopy,1H　Nuclear　Magnetic　Resonance　and　Gel　Permeation　Chromatography,　respectively.　The　surface　tension,　Zeta　potential,　adsorption　behavior　and　application　performance　in　concrete　are　measured.　The　result　shows　that　PPS　we　prepared　has　excellent　clay-inerting　and　high　slump　retention　capability.　©　American　Concrete　Institute.　All　rights　reserved.