The invention relates to a diatom ooze coating. The diatom ooze coating is prepared via uniform mixing of following raw materials, by weight, 215 to 235 parts of diatomite, 40 to 60 parts of heavy calcium carbonate, 40 to 60 parts of talcum powder, 40 to 60 parts of titanium dioxide, 65 to 85 parts of latex powder, 2 to 6 parts of hydroxypropyl methyl cellulose, 180 to 220 parts of white cement with strength grade of 42.5, 20 to 40 parts of mica powder, 10 to 20 parts of wood white fiber, 3 to 7 parts of bentonite, 290 to 295 parts of snow white colored sand, 1 to 3 parts of a water reducer, 0.5 to 1.5 parts of stretch-proof fiber, and 0.2 to 0.8 part of a negative ion powder. The diatom ooze coating is convenient for construction, is nontoxic, is odourless, is excellent in durability, and is suitable to be used in northwest regions with dry climate; and no pollution is caused.