In　order　to　obtain　stable　and　dispersed　calcium　silicate　hydrate　(C-S-H)　crystal　nucleus,　improve　its　crystal　nucleus-inducing　effect　on　cement　hydration,　and　realize　the　efficient　utilization　of　cement　clinker.　Polycarboxylate　superplasticizers　(PCE)　with　different　proportions　of　acrylic　acid　(AA)　and　silane　group　(KH570)　were　prepared　via　free　radical　polymerization　to　disperse　calcium　silicate　hydrate　(C-S-H)　seeds.　The　corresponding　C-S-H/PCE　seeds　were　synthesized　by　a　solution　precipitation　method.　The　grain　size/size　distribution,　the　stability　of　C-S-H/PCE　seeds　and　the　bonding　mode　of　PCE　on　C-S-H　interface　were　investigated.　The　results　show　that　the　PCE　with　an　appropriate　proportion　of　KH570　can　effectively　control　the　grain　size　of　C-S-H/PCE　seeds.　The　adsorption　mode　of　PCE　on　C-S-H　surface　changes　from　Ca2+　complexation　to　a　more　stable　Si-O-Si　chemical　bond,　and　the　grain　size　of　C-S-H/PCE　seeds　firstly　decreases　and　then　increases　with　the　increase　of　KH570　ratio.　At　a　KH570　to　AA　ratio　of　1,　the　adsorption　layer　thickness　of　PCE　on　the　surface　of　C-S-H　is　2.5　nm,　the　grain　size　of　C-S-H/PCE　seeds　is　60　nm　and　the　stability　is　optimum.　The　PCE　undergoes　an　intramolecular　dehydration　condensation　process　under　alkaline　condition　with　further　increasing　the　proportion　of　KH570,　forming　a　reticulated　silicone　resin　structure,　which　is　unfavorable　for　the　regulation　of　grain　size　of　C-S-H/PCE　seeds.　©　2022,　Editorial　Department　of　Journal　of　the　Chinese　Ceramic　Society.　All　right　reserved.