Citric　acid　modified　low-molecular-weight　superplasticizers(LMWS)was　prepared　by　esterification　reaction　with　citric　acid(CA)and　methoxy　polyethylene　polypropylene　glycols(MPEPPG)as　main　raw　materials.　The　superplasticizers　were　tested　by　Fourier　transform　infrared　spectrometer　(FTIR),H　nuclear　magnetic　resonance　(H　NMR)and　gel　permeation　chromatography　(GPC)to　obtain　structural　parameters.　Meanwhile,　the　comprehensive　performance　of　LMWS　with　the　same　acid-ether　ratio　(n(CA)∶　n(MPEPPG)=　1　∶　1)and　different　molecular　weight　was　compared　by　the　dynamic　light　scattering　(DLS),　Zeta　potential　of　cement　paste,　the　adsorption　performance　of　superplasticizers　on　cement,　setting　time　of　cement　paste,　cement　hydration　heat,　plastic　viscosity,　fluidity　of　cement　paste　and　concrete　performance.　The　results　showed　that　under　the　condition　of　same　dosage,　LMWS-3　with　moderate　molecular　weight　significantly　reduces　the　plastic　viscosity　of　cement　paste　and　delays　the　hydration　process　of　cement,　and　also　has　excellent　initial　dispersion　and　dispersion　retention　performance.　©　2024　Cailiao　Daobaoshe/　Materials　Review.　All　rights　reserved.