The invention provides an environment-friendly antibacterial water paint and a preparation method thereof. The components include deionized water, germicide, assistant for film forming, defoaming agent,
wetting agent, dispersant, nanometer TiO2,
emulsion or water dispersoid resin, filler, anti-
settling agent, flatting agent, thickener, pH
regulator, scratch resistance agent or slipping agent,
pigment or coloring agent, additive with special function and the like. The preparation method includes the steps of: A. preparing the water dispersoid; B. adding the water dispersoid obtained in the step A into the stirred
emulsion, then adding the assistant for film forming, the flatting agent, the thickener, the anti-
settling agent, and the pH
regulator and uniformly stirring and dispersing the components; C. adding the
pigment or the coloring agent; and D. charging water and adjusting the Stormer
viscosity at the temperature of 25 DEG C to be 65-90KU, thus obtaining the water paint. The water paint provided in the invention has good adhesion to wood materials, full paint films with certain
hardness, low VOC, no heavy
metal, and the antibacterial and mildewproof functions, and belongs to the environment-friendly and safe children woodwork water paint.