The invention belongs to the field of building coatings and particularly relates to a functional inorganic mineral wall material. The functional inorganic mineral wall material is prepared from, by mass, 20-40 parts of ground calcium carbonate, 10-20 parts of ash calcium powder, 0-10 parts of washed kaolin, 0-10 parts of metakaolin, 0-10 parts of calcined kaolin, 0-5 parts of calcium bentonite, 5-15 parts of diatomaceous earth, 0-10 parts of zeolites, 10-30 parts of modified gypsum, 0-20 parts of magnesium oxide, 0-10 parts of magnesium sulfate, 0-5 parts of titanium dioxide, 0-5 parts of white cement, 0-5 parts of sepiolite, 0-5 parts of attapulgite, 2-5 parts of talcum powder, 0-5 parts of wollastonite, 0.5-1 part of water-retaining agent and 0-2 parts of nano titanium dioxide photocatalyst.