The invention discloses a building external wall temperature-change-resistant anti-oxidative color 
coating, which is prepared from the following raw materials in parts by weight: 20 to 25 parts of carboxylic waterborne 
polyurethane, 19 to 24 parts of pure 
silicon resin 
emulsion, 11 to 16 parts of 
cobalt blue, 10 to 15 parts of mill base, 8 to 12 parts of 
bentonite, 7 to 11 parts of 
mica powder, 6 to 10 parts of kaolin, 5 to 9 parts of talcum 
powder, 12 to 14 parts of 
sodium carbonate, 9 to 11 parts of 
sodium tripolyphosphate, 10 to 12 parts of polyoxyethylene aliphatic ester, 8 to 10 parts of 
sodium polyacrylate, 13 to 16 parts of sheet 
zinc powder, 7 to 11 parts of aluminum 
hydroxide, 5 to 8 parts of 
silicon nitride, and 30 to 35 parts of deionized water. A preparation method comprises the following steps of S1, adding the carboxylic waterborne 
polyurethane, the pure siliconresin 
emulsion, the 
cobalt blue, the mill base and the deionized water into a stirrer, and stirring with the stirring speed of 30 to 40rpm for 20 to 30min at the temperature of 40 to 50 DEG C; S2, adding the sheet 
zinc powder, the aluminum 
hydroxide and the 
silicon nitride for stirring with the stirring speed of 100 to 150rpm for 5 to 10min. The building external wall temperature-change-resistant anti-oxidativecolor 
coating provided by the invention has excellent temperature alternating resistance and 
oxidation resistance, has high tensile strength and favorable flexibility, and is simple in preparation process, convenient to use, and low in cost.