In　recent　years,　the　addition　of　nanometer　materials　to　concrete　materials　has　attracted　a　group　of　increasing　number　of　scholars＇　research　interests,　and　nano-SiO2　is　one　of　the　research　hotspots.　In　this　paper,　we　briefly　introduce　the　influence　of　nano-SiO2　on　setting　time,　slump,　shrinkage,　durability　and　mechanical　properties　of　concrete.　In　addition,　this　review　also　includes　the　microstructure　measured　by　scanning　electron　microscope　(SEM)　and　the　content　of　various　hydration　products　obtained　by　X-ray　diffraction　(XRD).　The　result　shows　that　the　setting　time　of　nano-SiO2　concrete　is　shortened,　the　slump　is　reduced　and　the　shrinkage　is　improved　owing　to　the　high　activity　and　nucleation　of　nano-SiO2.　The　improvement　effect　of　nano-SiO2　on　concrete　is　remarkable,　especially　in　the　aspect　of　enhancing　the　durability　of　concrete.　It　should　be　noted　that　nano-SiO2　shows　limited　improvement　in　the　mechanical　properties　of　concrete.　In　the　end,　this　literature　summary　explains　the　macro　performance　of　nano-silica　modified　concrete　through　microstructure.