Abstract: Heat-insulation ATO films was prepared by silicone emulsion and ATO water slurry ,which worked as binders and fillers separately. The effects of ATO concentration on the transparence and heat-insulation property were investigated. With the ATO concentration improving, transmittance in both ultraviolet and visible region was reduced, while the heat-insulation property was developed. When the concentration of ATO maintained at 5%,the transmittance in visible region was 80% and the anti-heat temperature could reach 10℃.