The invention discloses a colorful special coating for a building. The colorful special coating for the building is prepared from the following raw materials in parts by weight: 0.8-3.4 parts of a polyethylene wax emulsion, 0.8-2.2 parts of rosin phenolic aldehyde modified resin, 0.6-1.6 parts of organosiloxane, 2-8 parts of lauryl sodium sulfate, 12-18 parts of ammonium persulfate, 20-40 parts of methyl methacrylate, 40-80 parts of a silicon sol, 6-12 parts of sodium tripolyphosphate, 4.3-6.7 parts of isotridecanol polyoxyethylene ether, 3.2-5.8 parts of 2-(2-methoxyl ethyoxyl) ethanol, 4-8 parts of rosin, 6-12 parts of powdery sodium silicate, 2-10 parts of polyethylene glycol and 2-10 parts of aqueous color paste. By blending the additive amounts of different raw materials, the coating is high in weather resistance and alkali resistance, can be suitable for different climate changes, is environment-friendly and energy-saving, does not harm the environment and human body and meets the diversified demand of the market; and by adding the aqueous color paste, the building coating disclosed by the invention converts different colors under different illumination conditions, and is high in ornamental value.