The　synthesis　process　of　esterification　products　used　for　the　preparation　of　polycarboxylate　superplasticizier(PCE)　was　systematically　investigated,　and　the　influences　of　water　dosage,　the　catalyst　dosage,　reaction　time　and　inhibitor　dosage　on　the　esterification　rate　and　cement　paste　fluidities　were　determined.　The　results　showed　that　the　esterification　rate　can　reach　more　than　95%　as　the　water-carrying　agent　of　70　g,　catalyst-alcohol　ratio　of　0.07,　reaction　time　of　7　hours,　inhibitor　-acrylic　acid　ratio　of　0.03,　respectively.　The　obtained　esterification　products　subsequently　copolymerized　with　macromonomer　to　prepare　PCE,　and　then　the　application　performances　were　tested　by　adding　PCE　to　cement　pastes.　From　the　fluidity　results,　the　cement　paste　fluidity　and　fluidity　retention　capacity　of　PCE　were　better　than　those　of　commercial　PCE,　and　this　was　in　accordance　with　the　high　esterification　rate　of　its　esterification　rate.