The invention discloses reflection and heat insulation paint for buildings. The reflection and heat insulation paint comprises the following ingredients in parts by weight: 9.5 to 23 parts of water, 0.44 to 1.08 parts of thickening agents, 0.45 to 0.55 parts of dispersing agents, 0.1 to 0.2 parts of
wetting agents, 0.4 to 0.8 parts of
defoaming agents, 0.05 to 0.25 parts of multifunctional auxiliaries, 0.05 to 0.15 parts of preservatives, 0.05 to 0.25 parts of mould inhibitors, 15 to 25 parts of
titanium dioxide, 0 to 22.5 parts of composite heat insulation
powder, 2 to 6.5 parts of fillings, 1 to 2 parts of antifreezing agents, 1.25 to 2 parts of film forming auxiliaries, 0.01 to 0.2 parts of emulsifying agents, 25 to 40 parts of
emulsion, 2.5 to 5 parts of hydrophobing agents, 0.05 to 0.15 parts of pH value regulating agents and 0.02 to 0.07 parts of
tributyl phosphate, wherein the composite heat insulation
powder is a
powder mixture obtained by Rectorite powder,
potassium hexatitanate
whiskers and ferro-
nickel spinel through mixed dispersion, and the hydrophobing agents are polysiloxane
emulsion. The reflection and heat insulation paint has high reflection, blockage and
radiation performance on solar spectrum, the heat insulation effect is good, in addition, the composite heat insulation power is easy to prepare, and the preparation cost is lower.