Afacilegreenlow-costcontrollablehydrothermal-thermalconversion(HTC)processfortheuniformhighaspectratioCaSiO3nanowireshasbeendevelopedusingabundantCaCl2·2H2OandNa2SiO3·9H2Oasrawmaterialswithoutanyorganicadditive.Thenanowiresexhibitedatransparentcharacteristicfromtheultraviolettovisibleregion,andtheCaSiO3:1.2%Tb3+nanophosphorswithwellpreserved1DmorphologydemonstratedstronggreenluminescencewithCIEcoordinatesof(x=0.3144,y=0.5912).Thepresentworkdefinitelyrevealsthenanowiresasapromisingstructureandfunctionintegratedhostcandidateforgreen-emittingluminescentmaterialsinlightdisplaysystemsandoptoelectronicdevices.