This invention relates to a method for preparing heat-insulating paint. The heat-insulating paint comprises: component A 75-90 wt.%, component B 5-20 wt.% and component C 5-20 wt.%. Component A comprises: emulsion 35-60 wt.%, emulsion paint auxiliary 5-30 wt.%, titanium dioxide 15-40 wt.% and water 20-45 wt.%. Component B is a surface-hydrophobic mineral material. Component C is heat-insulating silicate composite material. The method comprises modification treatment of the raw materials and preparation of the heat-insulating paint. The heat-insulating paint has such advantages as high IR reflectivity, good heat insulation, stable properties, low cost, convenient application and no environmental pollution. The method has such advantages as simple process and low cost, and is easy for mass production. |