Abstract: (In1-xSnx)2O3(x=0,0.01,0.02,0.05)powders with different Sn-doping amounts were prepared by solid state reaction at 800 ℃. The structure,optical properties and morphology of (In1-xSnx)2O3 powders were characterized by X-ray diffraction(XRD),Raman spectroscopy,Fourier transform Tnfrared (IR) spectroscopy,ultraviolet visible (Uv-vis) absorption spectrophotoscopy and scanning electron microscopy(SEM) in detail. The results show that all the (In1-xSnx)2O3 powders with different Sn-doping amounts remained the cubic crystal structure of indium oxide,and its UV-vis and IR absorption properties were changed by the Sn-doping,the growth of In2O3 particles was restrained,and thus their structure became more closely.