Water-based paint

The invention discloses water-based paint and belongs to the technical field of building materials. The water-based paint disclosed by the invention comprises the following materials in parts by weight: 36-40 parts of deionized water, 30-40 parts of transparent emulsion, 30-40 parts of 5% of solution of protective rubber powder, 5-8 parts of ground limestone, 5-8 parts of roller coating type diatom ooze, 0.8-1.2 parts of a coalescing agent, 0.8-1.2 parts of cellulose and 0.1-0.3 part of an antifoaming agent, wherein the roller coating type diatom ooze comprises the following materials in partsby weight: 30-40 parts of deionized water, 20-30 parts of dried diatomite powder, 10-20 parts of rubber powder, 1-2 parts of titanium dioxide, 1-2 parts of cellulose and 2-4 parts of white sand powder. The dried diatomite powder is prepared by the steps: scrubbing diatomite ore, obtaining refined diatomite after scrubbing the diatomite ore, performing vacuum freeze drying on the refined diatomite, and drying, thereby obt