Environmentally friendly aqueous nanometer inorganic coating material and preparation method thereof

The present invention discloses an environmentally friendly aqueous nanometer inorganic coating material and a preparation method thereof. The environmentally friendly aqueous nanometer inorganic coating material comprises a component A and a component B, wherein the component A comprises, by weight, 5-15 parts of a pigment, 1-2 parts of an additive, 30-40 parts of calcium carbonate, 5-15 parts of a macromolecule polymer, and 20-30 parts of water, and the component B comprises, by weight, 3-5 parts of nanometer silica, 10-15 parts of nanometer titanium dioxide, 10-15 parts of a dispersant, and 40-50 parts of water. According to the present invention, the non-toxic and non-hazardous material is used, the macromolecule polymer is used, and the pigment and the inorganic filler are used to obtain the environmentally friendly nanometer inorganic coating material; the nanometer titanium dioxide powder is used, such that the product has characteristics of good cleaning property and good pollution resistance through the nanometer morphology and the high activity; and the used materials are simple and easy to obtain, and the production cost is substantially reduced.