：By adopting the sol-gel method, the TiO 2 /SiO 2 composite films were coated on the transparent glass with the ethyl orthosilicate (TEOS) and butyl titanate (TBOT) as precursor, while prepared by high pressure spraying process and treated at temperature of 450 ℃ . The morphological characteristics and microstructure of TiO 2 /SiO 2 com- posite films coated on the glass surface were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier infrared spectroscopy (FTIR). Combined with the characterization results of the TiO 2 /SiO 2 compos- ite films, the light transmission and heat insulation properties of the glass were tested and analyzed by using a visible spectrophotometer and a self-made glass heat insulation device. The results showed that, after coating the glass surface with the TiO 2 /SiO 2 composite films, the transmittance of glass in the visible light range (400~800 nm) was above 80%. Compared with blank glass, the thermal insulation temperature of glass was 4.5 ℃ .