Water-based exterior wall paint is made of special acrylic copolymer emulsion, pigments, fillers and additives. It uses water as a solvent, is non-toxic and tasteless, does not contain benzene organic solvents, formaldehyde and harmful heavy metal ions, and has no pollution to the environment. Dry block of paint film, good adhesion, high gloss and color retention, water resistance, alkali resistance, pollution resistance, and scrub resistance. The construction is simple and suitable for the decoration of the exterior walls of various buildings.