The invention provides diatom ooze dry-powdered emulsion paint for interior walls and relates to the technical field of dry-powdered coatings. The diatom ooze dry-powdered emulsion paint for interior walls is prepared from 18-28 parts of diatom ooze, 15-25 parts of lithopone, 5-15 parts of titanium dioxide, 15-25 parts of quick lime, 8-15 parts of talcum powder, 8-12 parts of starch, 2-4 parts of mica powder, 1-2 parts of kaolin, 2-3 parts of white cement, 0.5-1.5 parts of redispersible latex powder, 0.5-1.5 parts of cellulose, 0.5-1.5 parts of a pigment, 1-2 parts of a defoaming agent, 0.1-0.3 part of a thickener, and 0.5-1.5 parts of a dispersant. The technical problems are solved that waterborne coatings for interior walls have high transportation and storage cost and the large quantity of liquid storage containers results in environmental pollution, the application cost of latex paint for inter walls is reduced, the construction process is simplified, environmental pollution is decreased, the indoor air can also be purified, the indoor humidity can be regulated, and the emulsion paint is healthy and environment-friendly.